Your network consists of a single Active Directory domain. All servers run Windows Server 2003 Service Pack 2 (SP2). All client computers run Windows XP Service Pack 3 (SP3). You install and configure Microsoft Windows Server Update Services (WSUS) 3.0 on a member server named Server1. You create a new Group Policy Object named GPO1 that enables automatic updating. You link GPO1 to the domain. You need to ensure that each client computer obtains software updates from Server1. What should you do? （）

• A、On each client computer, run Gpupdate /Force.
• B、On each client computer, run wuauclt /detectnow.
• C、From GPO1, configure the Enable client-side targeting setting.
• D、From GPO1, configure the Specify intranet Microsoft update service location setting.