Your network contains an Active Directory forest named contoso.com. The forest contains
five domains. You need to ensure that the CountryCode attribute is replicated to the global catalog.
What should you do?
A.
Modify the schema partition.
B.
Create and modify an application partition.
C.
Modify the configuration partition.
D.
Modify the domain partitions.
A.
You can tell an attribute to replicate to the GC by modifyig the Schema.
https://support.microsoft.com/en-us/kb/248717