Your company has a main office and 10 branch offices. Each branch office has an Active Directory site  that contains one domain controller. Only domain controllers in the main office are configured as Global  Catalog servers.   You need to deactivate the Universal Group Membership Caching option on the domain controllers in the  branch offices.    At which level should you deactivate the Universal Group Membership Caching option（）

• A、Site
• B、Server
• C、Domain
• D、Connection object