Which tool should you use?

Your network contains an Active Directory forest named contoso.com. The forest contains a
single domain. The forest functional level is Windows Server 2012 R2.
You have a domain controller named DC1.
On DC1, you create a new Group Policy object (GPO) named GPO1.
You need to verify that GPO1 was replicated to all of the domain controllers.
Which tool should you use?

A.
Group Policy Management

B.
Active Directory Sites and Services

C.
DFS Management

D.
Active Directory Administrative Center

Explanation:
http://social.technet.microsoft.com/Forums/en-US/winserverTS/thread/3e580e00-d619-4d25-b22d-18f0170279c4
http://technet.microsoft.com/en-us/library/jj134176.aspx