Your company has a single Active Directory domain. All domain controllers run Windows Server 2003. You install Windows Server 2008 R2 on a server.
You need to add the new server as a domain controller in your domain.
What should you do first?
A.
On the new server, run dcpromo /adv.
B.
On the new server, run dcpromo /createdcaccount.
C.
On a domain controller run adprep /rodcprep.
D.
On a domain controller, run adprep /forestprep.