Your network contains an Active Directory forest named adatum.com. All domain controllers currently run Windows Server 2003 Service Pack 2 (SP2). The functional level of the forest and the domain is Windows Server 2003.
You need to deploy a read-only domain controller (RODC) that runs Windows Server 2008 R2.
What should you do first?
A.
Deploy a writable domain controller that runs Windows Server 2008 R2.
B.
Raise the functional level of the forest to Windows Server 2008.
C.
Run adprep.exe.
D.
Raise the functional level of the domain to Windows Server 2003.