Your company has an Active Directory Domain Services (AD DS) domain. All servers run Windows Server 2008 R2. All client computers run Windows 7. Your environment includes Microsoft Enterprise Desktop Virtualization (MED-V). You use MED-V to support temporary test environments. You need to ensure that the disk space used by obsolete Workspaces is automatically minimized. Which two actions should you perform?（）

• A、Configure the Workspace as revertible.
• B、Set an expiration date for the Workspace.
• C、Specify the number of image versions to keep.
• D、Configure automatic deletion of the Workspace.