Which tool should you use?

Your network contains an Active Directory domain named contoso.com. The Active Directory Recycle bin is
enabled for contoso.com.
A support technician accidentally deletes a user account named User1.
You need to restore the User1 account.
Which tool should you use?

A.
Ldp

B.
Esentutl

C.
Active Directory Administrative Center

D.
Ntdsutil

Explanation:
http://technet.microsoft.com/nl-nl/library/dd379509(v=ws.10).aspx#BKMK_2
http://technet.microsoft.com/en-us/magazine/2007.09.tombstones.aspx
http://technet.microsoft.com/en-us/library/hh875546.aspx
http://technet.microsoft.com/en-us/library/dd560651(v=ws.10).aspx