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. Due to unforeseen circumstances a technician accidentally deleted a user account. Furthermore the error has replicated to the other domain controllers. You have received instructions from the CIO to retrieve the user account.
What should you do?

A.
The best option is to restart the domain controller into DSRM and restore the system state. You should then do an authoritative restore of the user account from the most recent backup by running the wbadmin.exe command.

B.
The best option is to stop the Active Directory Domain Services on the domain controller in normal mode and load the Windows Server Backup and restore system state. Thereafter, run a non-authoritative restore of the user account.

C.
The best option is to restart the domain controller into DSRM and restore the system state. You should then do a non-authoritative restore of the user account from the most recent backup by running the wbadmin.exe command.

D.
The best option is to stop the Active Directory Domain Services on the domain controller in normal mode and load the Windows Server Backup and restore system state. Thereafter, run an authoritative restore of the user account.

Explanation:
You should run an authoritative restore of the user account from the most recent backup by running the wbadmin.exe command. This will also prevent it from being overwritten by directory replication.
Incorrect Answers:
B: You cannot use the Windows Server Backup to execute an authoritative restore via the GUI.
C: The non-authoritative restore will bring back the user account. But if directory replication took place, it will be deleted.