You are the network administrator for your company. The network consists of a single Active Directory domain. All servers run Windows Server 2003. You need to update six high-visibility servers with critical updates by using Windows Server Update Services （WSUS）. You approve all of the updates. You need to ensure that the updates are applied within one hour. What should you do？（）
- AOn the WSUS server， type the gpupdate /force command at the command prompt.
- BOn the WSUS server， type the wuauclt /detectnow command at the command prompt.
- COn each of the six servers， type the gpupdate /force command at the command prompt.
- DOn each of the six servers， type the wuauclt /detectnow command at the command prompt.