Your network contains an Active Directory forest. The forest contains two domains named  contoso.com and woodgrovebank.com.   You have a custom attribute named Attibute1 in Active Directory. Attribute1 is associated to User objects.   You need to ensure that Attribute1 is replicated to the global catalog.   What should you do（）

• A、In Active Directory Sites and Services， configure the NTDS Settings.
• B、In Active Directory Sites and Services， configure the universal group membership caching.
• C、From the Active Directory Schema snap-in， modify the properties of the User class schema object.
• D、From the Active Directory Schema snap-in， modify the properties of the Attibute1 class schema  attribute.