You need to ensure that the new zone will be replicated to only four of the domain controllers

Your network contains an Active Directory domain named adatum.com. The domain
contains 10 domain controllers that run Windows Server 2012 R2.
You plan to create a new Active Directory-integrated zone named contoso.com.
You need to ensure that the new zone will be replicated to only four of the domain
controllers.
What should you do first?

A.
Create an application directory partition.

B.
Create an Active Directory connection object.

C.
Create an Active Directory site link.

D.
Change the zone replication scope.

Explanation:
Application directory partitions

An application directory partition is a directory partition that is replicated only to specific
domain controllers. A domain controller that participates in the replication of a particular
application directory partition hosts a replica of that partition. Only domain controllers running
Windows Server 2003 can host a replica of an application directory partition.