What should you do?

You are working as an enterprise administrator at Domain.com. The Domain.com network consists of a single Active Directory forest that contains a single domain named Domain.com. All servers on the Domain.com network run Windows Server 2008.
Domain.com contains a domain controller named CERTKILLER-DC03. During a routine monitoring you notice that Active Directory database file on CERTKILLER-DC03 is corrupt. Yu then plan to use the non-authoritative restore on CERTKILLER-DC03 and reboot a server into DSRM to log onto as the domain administrator. However, it does not allow you to log on. You need to backup CERTKILLER-DC03 as quick as possible.
What should you do?

A.
The best option is use the local administrators account to log on to the server.

B.
The best option is use another user’s domain administrator’s account to log on to the server.

C.
The best option is use the DSRM administrators account and password to log on.

D.
The best option is change the domain administrator’s password from another domain controller and log on using the account with the new password.

Explanation:

You need to use the DSRM administrators account and password to log on. You should then use the DCPROMO wizard and convert the server into a domain controller.
Incorrect Answers:
A: The local administrator account does not exist on a domain controller.
B: You should use the DSRM account. You cannot use the Domain admin accounts to log on to the server in the DSRM mode.