Domain.com has employed you as a junior technician. The Domain.com network consists of a single Active Directory domain named Domain.com. All servers on the Domain.com network run Windows Server 2008. Half the client computers run Windows XP Professional, and the rest run Windows Vista. You need to identify the computers on the Domain.com network that will contain a copy of the Global Catalog (GC).
What should you identify?

A.
You should identify the specific Active Directory domain controllers.

B.
You should identify the Active Directory computers.

C.
You should identify all the Active Directory domain controllers.

D.
You should identify all the Windows NT domain controllers.

Explanation:
Domain.com systems administrators have the ability to define which domain controllers in the environment contain a copy of the GC. However the GC does contain information regarding every domain in the environment, it does not need to reside on every domain controller.