You have a server that runs Windows Server 2003 Service Pack 2 (SP2). The server has Windows Server Update Services (WSUS) 3.0 installed. The server contains a single 30-GB volume named Volume1. Volume1 is 90 percent full.  You install a new 136-GB hard disk in the server. You create a new 136-GB volume named Volume2. You need to increase the storage space available to WSUS.  What should you do?（）    

• A、Use wsusutil.exe to copy the updates to Volume2. Manually delete the folder that contains the updates on Volume1.
• B、Use ntbackup.exe to backup the updates on Volume1. Restore the updates to Volume2. Manually delete the folder that contains the updates on Volume1.
• C、From the Update Services console， configure the server to download Express Installation files.
• D、Modify the HKEY_LOCAL_MACHINE/SOFTWARE/Microsoft/Update Services/Server/Setup/ContentDir registry setting. Restart the Update Services service.