ABC.comhas a networkthat consists of a single Active Directory domain.
A technician has accidently deleted an Organizational unit (OU)on the domain controller.
As an administrator of ABC.com, you are in process of restoring the OU.
You need to execute a non-authoritative restore before an authoritative restore of the OU.
Which backup should you use to perform non-authoritative restore of Active Directory Domain Services
(AD DS) without disturbing other data stored on domain controller?

A.
Critical volume backup

B.
Backup of all the volumes

C.
Backup of the volume that hosts Operating system

D.
Backup of AD DS folders

E.
all of the above

Explanation:
http://technet.microsoft.com/en-us/library/cc730683%28v=ws.10%29.aspx
Performing a Nonauthoritative Restore of AD DS
To perform a nonauthoritative restore of Active Directory Domain Services (AD DS), you need at least asystem
state backup.
To restore a system state backup, use the wbadmin start systemstaterecovery command. The procedure in this
topic uses the wbadmin start systemstaterecovery command.
You can also use a critical-volume backupto perform a nonauthoritative restore, or a full server backup if
you do not have a system state or critical-volume backup. A full server backup is generally larger than a criticalvolume backup or system state backup. Restoring a full server backup not only rolls back data in AD DSto the
time of backup, but it also rolls back all data in other volumes. Rolling back this additional data isnot necessary
to achieve nonauthoritative restore of AD DS. To restore a critical-volume backup or full server backup, use the
wbadmin start recovery command.