You have a single Active Directory directory service domain. All client computers run either Windows XP or Windows Vista and are in an organizational unit (OU) named Client Computers. You create a new Group Policy object (GPO) named Secure Desktop to apply security settings. You link the GPO to the Client Computers OU. You examine a users client computer and find that the security settings have not been applied. You need to ensure that the security settings in the GPO are applied immediately after linking the GPO to the OU. What should you do?

A.
Run the gpupdate /force command on all domain controllers.

B.
Run the gpupdate /force command on the client computers.

C.
Run the secedit /validate command on all domain controllers.

D.
Run the secedit /validate command on the client computers.