diff --git a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Domain.Shared/EasyAbp/EShop/Plugins/Baskets/BasketsErrorCodes.cs b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Domain.Shared/EasyAbp/EShop/Plugins/Baskets/BasketsErrorCodes.cs
index 6bdd1cc5..d123b535 100644
--- a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Domain.Shared/EasyAbp/EShop/Plugins/Baskets/BasketsErrorCodes.cs
+++ b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Domain.Shared/EasyAbp/EShop/Plugins/Baskets/BasketsErrorCodes.cs
@@ -2,6 +2,7 @@
 {
     public static class BasketsErrorCodes
     {
+        public const string CheckCreateOrderFailed = "EasyAbp.EShop.Plugins.Baskets:CheckCreateOrderFailed";
         public const string ProductSkuNotFound = "EasyAbp.EShop.Plugins.Baskets:ProductSkuNotFound";
     }
 }
diff --git a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Domain.Shared/EasyAbp/EShop/Plugins/Baskets/Localization/en.json b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Domain.Shared/EasyAbp/EShop/Plugins/Baskets/Localization/en.json
index dd7ff74c..ba85b081 100644
--- a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Domain.Shared/EasyAbp/EShop/Plugins/Baskets/Localization/en.json
+++ b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Domain.Shared/EasyAbp/EShop/Plugins/Baskets/Localization/en.json
@@ -27,6 +27,7 @@
     "EditBasketItem": "Edit",
     "BasketItemDeletionConfirmationMessage": "Are you sure to delete the basket item {0}?",
     "SuccessfullyDeleted": "Successfully deleted",
+    "EasyAbp.EShop.Plugins.Baskets:CheckCreateOrderFailed": "You are not allowed to purchase the specified item. Reason: {reason}",
     "EasyAbp.EShop.Plugins.Baskets:ProductSkuNotFound": "Product {productId} (SKU: {productSkuId}) not found."
   }
 }
\ No newline at end of file
diff --git a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Domain.Shared/EasyAbp/EShop/Plugins/Baskets/Localization/zh-Hans.json b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Domain.Shared/EasyAbp/EShop/Plugins/Baskets/Localization/zh-Hans.json
index 31ebc3d7..9d917b82 100644
--- a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Domain.Shared/EasyAbp/EShop/Plugins/Baskets/Localization/zh-Hans.json
+++ b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Domain.Shared/EasyAbp/EShop/Plugins/Baskets/Localization/zh-Hans.json
@@ -27,6 +27,7 @@
     "EditBasketItem": "编辑",
     "BasketItemDeletionConfirmationMessage": "确认删除购物车项 {0}?",
     "SuccessfullyDeleted": "删除成功",
+    "EasyAbp.EShop.Plugins.Baskets:CheckCreateOrderFailed": "您无法购买指定商品，原因：{reason}",
     "EasyAbp.EShop.Plugins.Baskets:ProductSkuNotFound": "商品{productId}(SKU: {productSkuId})未找到"
   }
 }
\ No newline at end of file
diff --git a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Domain.Shared/EasyAbp/EShop/Plugins/Baskets/Localization/zh-Hant.json b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Domain.Shared/EasyAbp/EShop/Plugins/Baskets/Localization/zh-Hant.json
index a88995bb..20e509a7 100644
--- a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Domain.Shared/EasyAbp/EShop/Plugins/Baskets/Localization/zh-Hant.json
+++ b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Domain.Shared/EasyAbp/EShop/Plugins/Baskets/Localization/zh-Hant.json
@@ -27,6 +27,7 @@
     "EditBasketItem": "編輯",
     "BasketItemDeletionConfirmationMessage": "確認刪除購物車項 {0}?",
     "SuccessfullyDeleted": "刪除成功",
+    "EasyAbp.EShop.Plugins.Baskets:CheckCreateOrderFailed": "您無法購買指定商品，原因：{reason}",
     "EasyAbp.EShop.Plugins.Baskets:ProductSkuNotFound": "商品{productId}(SKU: {productSkuId})未找到"
   }
 }
\ No newline at end of file
diff --git a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/EShopPluginsBasketsWebModule.cs b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/EShopPluginsBasketsWebModule.cs
index 87e8b5b0..df6b7ca1 100644
--- a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/EShopPluginsBasketsWebModule.cs
+++ b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/EShopPluginsBasketsWebModule.cs
@@ -1,4 +1,5 @@
-using Microsoft.AspNetCore.Mvc.RazorPages;
+using EasyAbp.EShop.Orders;
+using Microsoft.AspNetCore.Mvc.RazorPages;
 using Microsoft.Extensions.DependencyInjection;
 using EasyAbp.EShop.Plugins.Baskets.Localization;
 using EasyAbp.EShop.Plugins.Baskets.Web.Menus;
@@ -12,6 +13,7 @@ using Volo.Abp.VirtualFileSystem;
 namespace EasyAbp.EShop.Plugins.Baskets.Web
 {
     [DependsOn(
+        typeof(EShopOrdersApplicationContractsModule),
         typeof(EShopPluginsBasketsApplicationContractsModule),
         typeof(AbpAspNetCoreMvcUiThemeSharedModule),
         typeof(AbpAutoMapperModule)
diff --git a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/EasyAbp.EShop.Plugins.Baskets.Web.csproj b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/EasyAbp.EShop.Plugins.Baskets.Web.csproj
index 26f20ae2..2ac0989a 100644
--- a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/EasyAbp.EShop.Plugins.Baskets.Web.csproj
+++ b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/EasyAbp.EShop.Plugins.Baskets.Web.csproj
@@ -17,6 +17,7 @@
   </ItemGroup>
 
   <ItemGroup>
+    <ProjectReference Include="..\..\..\..\modules\EasyAbp.EShop.Orders\src\EasyAbp.EShop.Orders.Application.Contracts\EasyAbp.EShop.Orders.Application.Contracts.csproj" />
     <ProjectReference Include="..\EasyAbp.EShop.Plugins.Baskets.Application.Contracts\EasyAbp.EShop.Plugins.Baskets.Application.Contracts.csproj" />
   </ItemGroup>
 
diff --git a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/Pages/EShop/Plugins/Baskets/BasketItems/BasketItem/CreateModal.cshtml b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/Pages/EShop/Plugins/Baskets/BasketItems/BasketItem/CreateModal.cshtml
index ac0ede94..fea6d104 100644
--- a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/Pages/EShop/Plugins/Baskets/BasketItems/BasketItem/CreateModal.cshtml
+++ b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/Pages/EShop/Plugins/Baskets/BasketItems/BasketItem/CreateModal.cshtml
@@ -1,6 +1,6 @@
 @page
+@using EasyAbp.EShop.Plugins.Baskets
 @using EasyAbp.EShop.Plugins.Baskets.Localization
-@using EasyAbp.EShop.Plugins.Baskets.Permissions
 @using Microsoft.AspNetCore.Authorization
 @using Microsoft.AspNetCore.Mvc.Localization
 @using Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Modal
@@ -25,16 +25,15 @@
 
 <script>
     var localStorageItemKey = localStorageItemKey || "EShopBasket:" + basketName;
+    var l = abp.localization.getResource('EasyAbpEShopPluginsBaskets');
 
     $(document).ready(function() {
         if (@(Model.ServerSide ? "true" : "false")) return;
         
-        var $form = $("form");
-        $form.off('submit');
-        $form.on('submit', function(e){
-            e.preventDefault();
-            var service = easyAbp.eShop.plugins.baskets.basketItems.basketItem;
-            service.generateClientSideData({ items: [ $form.serializeFormToObject().viewModel ] }, {
+        function generateClientSideData(formObj) {
+            var basketItemService = easyAbp.eShop.plugins.baskets.basketItems.basketItem;
+
+            basketItemService.generateClientSideData({ items: [ formObj.viewModel ] }, {
                 success: function (responseText, statusText, xhr, form) {
                     var basketItems = JSON.parse(localStorage.getItem(localStorageItemKey)) || [];
                     basketItems = pushOrUpdateBasketItem(basketItems, responseText.items[0])
@@ -48,6 +47,34 @@
                     })
                 }
             });
+        }
+        
+        var $form = $("form");
+        $form.off('submit');
+        $form.on('submit', function(e){
+            e.preventDefault();
+            var orderService = easyAbp.eShop.orders.orders.order;
+            var formObj = $form.serializeFormToObject();
+            if (abp.currentUser.isAuthenticated) {
+                orderService.checkCreate({
+                    storeId: formObj.viewModel.storeId,
+                    orderLines: [{
+                        productId: formObj.viewModel.productId,
+                        productSkuId: formObj.viewModel.productSkuId,
+                        quantity: formObj.viewModel.quantity
+                    }]
+                }, {
+                    success: function (responseText, statusText, xhr, form) {
+                        if (responseText.canCreate) {
+                            generateClientSideData(formObj);
+                        } else {
+                            abp.message.error(l('@BasketsErrorCodes.CheckCreateOrderFailed', responseText.reason));
+                        }
+                    }
+                });
+            } else {
+                generateClientSideData(formObj);
+            }
         });
     });
     
diff --git a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/Pages/EShop/Plugins/Baskets/BasketItems/BasketItem/CreateModal.cshtml.cs b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/Pages/EShop/Plugins/Baskets/BasketItems/BasketItem/CreateModal.cshtml.cs
index d73c5e61..f7718fa5 100644
--- a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/Pages/EShop/Plugins/Baskets/BasketItems/BasketItem/CreateModal.cshtml.cs
+++ b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/Pages/EShop/Plugins/Baskets/BasketItems/BasketItem/CreateModal.cshtml.cs
@@ -1,10 +1,14 @@
+using System.Collections.Generic;
 using System.Threading.Tasks;
+using EasyAbp.EShop.Orders.Orders;
+using EasyAbp.EShop.Orders.Orders.Dtos;
 using Microsoft.AspNetCore.Mvc;
 using EasyAbp.EShop.Plugins.Baskets.BasketItems;
 using EasyAbp.EShop.Plugins.Baskets.BasketItems.Dtos;
 using EasyAbp.EShop.Plugins.Baskets.Permissions;
 using EasyAbp.EShop.Plugins.Baskets.Web.Pages.EShop.Plugins.Baskets.BasketItems.BasketItem.ViewModels;
 using Microsoft.AspNetCore.Authorization;
+using Volo.Abp;
 using Volo.Abp.Settings;
 
 namespace EasyAbp.EShop.Plugins.Baskets.Web.Pages.EShop.Plugins.Baskets.BasketItems.BasketItem
@@ -13,14 +17,18 @@ namespace EasyAbp.EShop.Plugins.Baskets.Web.Pages.EShop.Plugins.Baskets.BasketIt
     {
         [BindProperty]
         public CreateBasketItemViewModel ViewModel { get; set; } = new();
-        
+
         public bool ServerSide { get; set; }
 
-        private readonly IBasketItemAppService _service;
+        private readonly IOrderAppService _orderAppService;
+        private readonly IBasketItemAppService _basketItemAppService;
 
-        public CreateModalModel(IBasketItemAppService service)
+        public CreateModalModel(
+            IOrderAppService orderAppService,
+            IBasketItemAppService basketItemAppService)
         {
-            _service = service;
+            _orderAppService = orderAppService;
+            _basketItemAppService = basketItemAppService;
         }
 
         public virtual async Task OnGetAsync()
@@ -32,7 +40,29 @@ namespace EasyAbp.EShop.Plugins.Baskets.Web.Pages.EShop.Plugins.Baskets.BasketIt
         public virtual async Task<IActionResult> OnPostAsync()
         {
             var dto = ObjectMapper.Map<CreateBasketItemViewModel, CreateBasketItemDto>(ViewModel);
-            await _service.CreateAsync(dto);
+
+            var checkCreateOrderResult = await _orderAppService.CheckCreateAsync(new CheckCreateOrderInput
+            {
+                StoreId = ViewModel.StoreId,
+                OrderLines = new List<CreateOrderLineDto>
+                {
+                    new()
+                    {
+                        ProductId = ViewModel.ProductId,
+                        ProductSkuId = ViewModel.ProductSkuId,
+                        Quantity = ViewModel.Quantity
+                    }
+                }
+            });
+
+            if (!checkCreateOrderResult.CanCreate)
+            {
+                throw new BusinessException(BasketsErrorCodes.CheckCreateOrderFailed)
+                    .WithData("reason", checkCreateOrderResult.Reason);
+            }
+
+            await _basketItemAppService.CreateAsync(dto);
+
             return NoContent();
         }
     }
diff --git a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/Pages/EShop/Plugins/Baskets/BasketItems/BasketItem/EditModal.cshtml b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/Pages/EShop/Plugins/Baskets/BasketItems/BasketItem/EditModal.cshtml
index 051be9b3..7227efc4 100644
--- a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/Pages/EShop/Plugins/Baskets/BasketItems/BasketItem/EditModal.cshtml
+++ b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/Pages/EShop/Plugins/Baskets/BasketItems/BasketItem/EditModal.cshtml
@@ -1,8 +1,9 @@
 @page
+@using EasyAbp.EShop.Plugins.Baskets
 @using EasyAbp.EShop.Plugins.Baskets.Localization
-@using EasyAbp.EShop.Plugins.Baskets.Permissions
 @using Microsoft.AspNetCore.Authorization
 @using Microsoft.AspNetCore.Mvc.Localization
+@using Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Form
 @using Volo.Abp.AspNetCore.Mvc.UI.Bootstrap.TagHelpers.Modal
 @using Volo.Abp.Settings
 @inject IHtmlLocalizer<BasketsResource> L
@@ -28,19 +29,11 @@
 
     $(document).ready(function() {
         if (@(Model.ServerSide ? "true" : "false")) return;
-        
-        var basketItems = JSON.parse(localStorage.getItem(localStorageItemKey)) || [];
-        var index = basketItems.findIndex(x => x.id === '@Model.Id');
 
-        $('#ViewModel_Quantity').val(basketItems[index].quantity);
-        
-        var $form = $("form");
-        $form.off('submit');
-        $form.on('submit', function(e){
-            e.preventDefault();
-            var service = easyAbp.eShop.plugins.baskets.basketItems.basketItem;
-            basketItems[index].quantity = parseInt($form.serializeFormToObject().viewModel.quantity);
-            service.generateClientSideData({ items: [ basketItems[index] ] }, {
+        function generateClientSideData(basketItems) {
+            var basketItemService = easyAbp.eShop.plugins.baskets.basketItems.basketItem;
+
+            basketItemService.generateClientSideData({ items: [ basketItems[index] ] }, {
                 success: function (responseText, statusText, xhr, form) {
                     localStorage.setItem(localStorageItemKey, JSON.stringify(basketItems));
                     $form.trigger('abp-ajax-success',
@@ -52,6 +45,39 @@
                     })
                 }
             });
+        }
+        
+        var basketItems = JSON.parse(localStorage.getItem(localStorageItemKey)) || [];
+        var index = basketItems.findIndex(x => x.id === '@Model.Id');
+
+        $('#ViewModel_Quantity').val(basketItems[index].quantity);
+        
+        var $form = $("form");
+        $form.off('submit');
+        $form.on('submit', function(e){
+            e.preventDefault();
+            var orderService = easyAbp.eShop.orders.orders.order;
+            basketItems[index].quantity = parseInt($form.serializeFormToObject().viewModel.quantity);
+            if (abp.currentUser.isAuthenticated) {
+                orderService.checkCreate({
+                    storeId: basketItems[index].storeId,
+                    orderLines: [{
+                        productId: basketItems[index].productId,
+                        productSkuId: basketItems[index].productSkuId,
+                        quantity: basketItems[index].quantity
+                    }]
+                }, {
+                    success: function (responseText, statusText, xhr, form) {
+                        if (responseText.canCreate) {
+                            generateClientSideData(basketItems);
+                        } else {
+                            abp.message.error(l('@BasketsErrorCodes.CheckCreateOrderFailed', responseText.reason));
+                        }
+                    }
+                });
+            } else {
+                generateClientSideData(basketItems);
+            }
         });
     });
 </script>
\ No newline at end of file
diff --git a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/Pages/EShop/Plugins/Baskets/BasketItems/BasketItem/EditModal.cshtml.cs b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/Pages/EShop/Plugins/Baskets/BasketItems/BasketItem/EditModal.cshtml.cs
index c6d5a5fc..ff5ebc11 100644
--- a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/Pages/EShop/Plugins/Baskets/BasketItems/BasketItem/EditModal.cshtml.cs
+++ b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/Pages/EShop/Plugins/Baskets/BasketItems/BasketItem/EditModal.cshtml.cs
@@ -1,12 +1,16 @@
 using System;
+using System.Collections.Generic;
 using System.ComponentModel.DataAnnotations;
 using System.Threading.Tasks;
+using EasyAbp.EShop.Orders.Orders;
+using EasyAbp.EShop.Orders.Orders.Dtos;
 using Microsoft.AspNetCore.Mvc;
 using EasyAbp.EShop.Plugins.Baskets.BasketItems;
 using EasyAbp.EShop.Plugins.Baskets.BasketItems.Dtos;
 using EasyAbp.EShop.Plugins.Baskets.Permissions;
 using EasyAbp.EShop.Plugins.Baskets.Web.Pages.EShop.Plugins.Baskets.BasketItems.BasketItem.ViewModels;
 using Microsoft.AspNetCore.Authorization;
+using Volo.Abp;
 using Volo.Abp.Settings;
 
 namespace EasyAbp.EShop.Plugins.Baskets.Web.Pages.EShop.Plugins.Baskets.BasketItems.BasketItem
@@ -27,11 +31,15 @@ namespace EasyAbp.EShop.Plugins.Baskets.Web.Pages.EShop.Plugins.Baskets.BasketIt
         [BindProperty]
         public EditBasketItemViewModel ViewModel { get; set; }
 
-        private readonly IBasketItemAppService _service;
+        private readonly IOrderAppService _orderAppService;
+        private readonly IBasketItemAppService _basketItemAppService;
 
-        public EditModalModel(IBasketItemAppService service)
+        public EditModalModel(
+            IOrderAppService orderAppService,
+            IBasketItemAppService basketItemAppService)
         {
-            _service = service;
+            _orderAppService = orderAppService;
+            _basketItemAppService = basketItemAppService;
         }
 
         public virtual async Task OnGetAsync()
@@ -44,14 +52,38 @@ namespace EasyAbp.EShop.Plugins.Baskets.Web.Pages.EShop.Plugins.Baskets.BasketIt
                 return;
             }
             
-            var dto = await _service.GetAsync(Id);
+            var dto = await _basketItemAppService.GetAsync(Id);
             ViewModel = ObjectMapper.Map<BasketItemDto, EditBasketItemViewModel>(dto);
         }
 
         public virtual async Task<IActionResult> OnPostAsync()
         {
+            var item = await _basketItemAppService.GetAsync(Id);
+
             var dto = ObjectMapper.Map<EditBasketItemViewModel, UpdateBasketItemDto>(ViewModel);
-            await _service.UpdateAsync(Id, dto);
+            
+            var checkCreateOrderResult = await _orderAppService.CheckCreateAsync(new CheckCreateOrderInput
+            {
+                StoreId = item.StoreId,
+                OrderLines = new List<CreateOrderLineDto>
+                {
+                    new()
+                    {
+                        ProductId = item.ProductId,
+                        ProductSkuId = item.ProductSkuId,
+                        Quantity = ViewModel.Quantity
+                    }
+                }
+            });
+
+            if (!checkCreateOrderResult.CanCreate)
+            {
+                throw new BusinessException(BasketsErrorCodes.CheckCreateOrderFailed)
+                    .WithData("reason", checkCreateOrderResult.Reason);
+            }
+            
+            await _basketItemAppService.UpdateAsync(Id, dto);
+            
             return NoContent();
         }
     }
diff --git a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/Pages/EShop/Plugins/Baskets/BasketItems/BasketItem/index.js b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/Pages/EShop/Plugins/Baskets/BasketItems/BasketItem/index.js
index b4b06c59..950d55d2 100644
--- a/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/Pages/EShop/Plugins/Baskets/BasketItems/BasketItem/index.js
+++ b/plugins/Baskets/src/EasyAbp.EShop.Plugins.Baskets.Web/Pages/EShop/Plugins/Baskets/BasketItems/BasketItem/index.js
@@ -120,15 +120,30 @@ $(function () {
     
     function createManyServerSideBasketItems(items, autoReloadDataTable = true) {
         var item = items.shift();
-        service.create(item, {
-            success: function () {
-                if (items.length > 0) {
-                    createManyServerSideBasketItems(items);
-                } else if (autoReloadDataTable) {
-                    dataTable.ajax.reload();
+        var orderService = easyAbp.eShop.orders.orders.order;
+        orderService.checkCreate({
+            storeId: item.storeId,
+            orderLines: [{
+                productId: item.productId,
+                productSkuId: item.productSkuId,
+                quantity: item.quantity
+            }]
+        }, {
+            success: function (responseText, statusText, xhr, form) {
+                console.log(responseText);
+                if (responseText.canCreate) {
+                    service.create(item, {
+                        success: function () {
+                            if (items.length > 0) {
+                                createManyServerSideBasketItems(items);
+                            } else if (autoReloadDataTable) {
+                                dataTable.ajax.reload();
+                            }
+                        }
+                    })
                 }
             }
-        })
+        });
     }
 
     $('#NewBasketItemButton').click(function (e) {