You create a Microsoft ASP.NET Web application by using the Microsoft .NET Framework version 3.5. <br /> 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. <br /> Which code fragment should you use?()<img src="https://nimg.ppkao.com/2018-07/wangjing/2018073010481336105.jpg?sign=23d45c9368aa5b80e12b3642464c3975&t=62d2eac7" />
A、A
B、B
C、C
D、D