Your network contains an Active Directory domain. The domain contains a member server named Server1 that runs Windows Server 2008 R2. You need to configure Server1 as a global catalog server. What should you do?

A.
Modify the Active Directory schema.

B.
From Ntdsutil, use the Roles option.

C.
Run the Active Directory Domain Services Installation Wizard on Server1.

D.
Move the Server1 computer object to the Domain Controllers organizational unit (OU).