You are the domain administrator for your company's Active Directory domain. All servers run Windows Server 2003. The information technology (IT) department recently installed Windows Server Update Services (WSUS) to manage security updates. The server that runs WSUS is configured to automatically approve critical and security updates, and to synchronize automatically every day at 7:00 A.M. New critical security updates were released today at 9:00 A.M. You need to manually update the WSUS server and make the updates available to client computers. What should you do? （）

A. Log on to the WSUS server. Download and install the new security updates from Microsoft Update.
B. Download the new security updates from Microsoft Update to your local computer. Copy and paste the update files to the WSUSContent folder on the WSUS server.
Connect to the WSUS server home page. Click the Synchronize Now link.
D. Log on to the WSUS server. From the command line, run gpupdate /force.