In Windows Server 2008 R2, which of the following tools allows you to manually force replication between your domain controllers?

In Windows Server 2008 R2, which of the following tools allows you to manually force replication between your domain controllers?

• Active Directory Administrative Center
• Active Directory Sites and Services
• Active Directory Users and Computers
• Active Directory Domains and Trusts 

 EXPLANATION

You can use Active Directory Sites and Services to force Active Directory replication to occur between two domain controllers on a one-time basis when you want changes to be replicated from the server that received the changes to a server in another site sooner than the site link schedule allows.
As an alternative, you can synchronize replication with all replication partners.

SOURCE

https://technet.microsoft.com/en-us/library/cc816926(v=ws.10).aspx