You create a Microsoft ASP.NET Web application by using the Microsoft .NET Framework version 3.5.  The application uses ASP.NET AJAX， and you plan to deploy it in a Web farm environment. You need to configure SessionState for the application.  Which code fragment should you use？（） | English | Chinese | Japan | Korean | - 107 - Test Information Co., Ltd. All rights reserved. 

• A、A
• B、B
• C、C
• D、D