You work as an administrator at ABC.com. The ABC.com network has an Active Directory domain named ABC.com. All servers on the ABC.com network have Windows Server 2008 installed.

The ABC.com network has multiple domain controllers that can be written to, as well as multiple read-only domain controllers (RODCs).

When you are instructed to configure a new Windows Server 2008 R2 server as a RODC, you are also instructed to use as little administrative effort as possible.

You must be able to join the new RODC to the ABC.com domain.

Which of the following commands should you execute FIRST?

A.
adprep.exe /rodcprep

B.
adprep.exe /forestprep

C.
Dcpromo.exe

D.
adprep.exe /domainprep