You need to run adprep /domainprep successfully

Your network contains an Active Directory forest. The forest contains one domain named contoso.com.

You attempt to run adprep /domainprep and the operation fails.

You discover that the first domain controller deployed to the forest failed.

You need to run adprep /domainprep successfully.

What should you do?

A.
Move the domain naming master role.

B.
Install a read-only domain controller (RODC).

C.
Move the PDC emulator role.

D.
Move the RID master role.

E.
Move the infrastructure master role.

F.
Deploy an additional global catalog server.

G.
Move the bridgehead server.

H.
Move the schema master role.

I.
Restart the Active Directory Domain Services (AD DS) service.

J.
Move the global catalog server.