问题：

[单选]

You work as the IT professional in an international company which is named Wiikigo. You are experiencedin implementing and administering a network operating system. You are specialized in deploying servers，configuring Windows Server 2008 Terminal services and network application services， and configuring aweb services infrastructure. There is a Windows Server 2008 server， and the Web Server （IIS） server roleis installed on the server. Multiple Web sites are hosted by the server. Since you are the technical support，you are required to set the server to make it automatically release memory for a single Web site. What's more， no other Web sites should be impacted.
Which action should be performed to achieve the goal？（）

A . From the Application Pool Defaults， the Recycling options should be changed.
B . A new Web site should be created and the bindings should be edited for the Web site.
C . A new application pool should be created and the Web site should be associated to the application pool.
D . A new virtual directory should be created and the Physical Path Credentials on the virtual directoryshould be changed.