Your network contains an Active Directory domain. The domain contains a Windows Server Update Services (WSUS) server named Server1. A Group Policy object (GPO) named GPO1 configures all computers in the domain to use Server1 for Windows Update.You add a new Windows 7 computer named Computer1 to the domain.From the Update Services console, you discover that Computer1 is not listed as a member of any computer groups.You verify that GPO1 is applied to Computer1.You need to ensure that Computer1 is available in the Update Services console. What should you do？（）

• A、On Computer1, run wuauclt.exe /detectnow.
• B、On Computer1, run wuauclt.exe /reportnow.
• C、On Server1, run wsusutil.exe reset.
• D、On Server1, run wsusutil.exe listinactiveapprovals.