Your network contains 

Your network contains an Active Directory forest. The forest contains multiple sites.     You need to enable universal group membership caching for a site.  What should you do（）

• AFrom Active Directory Sites and Services， modify the NTDS Settings.
• BFrom Active Directory Sites and Services， modify the NTDS Site Settings.
• CFrom Active Directory Users and Computers， modify the properties of all universal groups used in the site.
• DFrom Active Directory Users and Computers， modify the computer objects for the domain controllers in the site.