问题：

[单选]

You are the newly appointed system administrator at Certkiller.com. You are in the process ofcreating a Microsoft ASP.NET application using Microsoft .NET Framework v3.5. 
The new application will make use of eleven themes. Certkiller clients will be permitted to selecttheir themes from the Web page. You need to make sure that the theme selected by a client isdisplayed when the client returns to the application. This should occur even when the client returnsto log on at a later date or from another workstation. 
You should take cognizance of the fact that the application operates on different storage types andin different environments. Management wants you tp store the themes selected by the clients aswell as retrieving the required theme. 
What should you do？（）

A . This can be accomplished using the Response.Cookies collection in order to store the name ofthe theme that is selected by the client.
B . This can be accomplished by retrieving the required theme name from the Session object everytime the client visits a page.
C . This can be accomplished by retrieving the required theme name every time the client visits apage.
D . This can be accomplished by retrieving the required theme name from the Application objectevery time the client visits a page.