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（）
- ASite
- BServer
- CDomain
- DConnection object