Your network contains an Active Directory domain named contoso.com.
The domain contains a domain controller named DC1.
You run ntdsutil as shown in the exhibit. (Click the Exhibit button.)

You need to ensure that you can access the contentsof the mounted snapshot. What should you do?

A.
From the snapshot context of ntdsutil, run activate instance “NTDS”.

B.
From a command prompt, run dsamain.exe -dbpath c:\$snap_201204131056_volumec$\windows\ntds\ntds.
dit Idapport 389.

C.
From the snapshot context of ntdsutil, run mount {79f94f82-5926-4f44-8af0-2f56d827a57d}.

D.
From a command prompt, run dsamain.exe -dbpath c:\$snap_201204131056_volumec$\windows\ntds\ntds.
dit Idapport 33389.

Explanation:
This is a live DC, so 389 is already in use; 33389 would not be so is a valid port.
http://technet.microsoft.com/en-us/library/cc753609(v=ws.10).aspx