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. You have accidentally altered a user’s group settings. You need to restore the default settings.
What should you do?

A.
The best option is to perform auditing.

B.
The best option is to restore tapes.

C.
The best option is to use a recovery disk.

D.
The best option is to enter safe mode and then restore from tape.

Explanation:
The Microsoft Windows Server 2008 auditing feature allows you to view the new and the old values of the object and its characteristics. Once you have viewed the old values it is possible restore them.