Your company has a server named Server1 that runs Windows Server 2008. Server1 is a Windows ServerUpdate Services (WSUS) server. You have a computer named Computer1 that runs Windows 7. Computer1 is configured to obtain updates from Server1. You open the WSUS snap-in on Server1 and discover that Computer1 does not appear. You need to ensure that Computer1 appears in the WSUS snap-in. What should you do?（）

A. On Server1， open Windows Update then select Check for updates.
B. On Server1， run Wsusutil.exe and specify the /import parameter.
C. On Computer1， open Windows Update and then select Change settings.
D. On Computer1， run Wuauclt.exe and specify the /detectnow parameter.