You need to ensure that RODC1 has a copy of the DNS application directory partition of contoso.com

Your network contains an Active Directory forest named contoso.com. The functional level of
the forest is Windows Server 2008 R2.
The DNS zone for contoso.com is Active Directory-integrated.
You deploy a read-only domain controller (RODC) named RODC1.
You install the DNS Server server role on RODC1.
You discover that RODC1 does not have any DNS application directory partitions.
You need to ensure that RODC1 has a copy of the DNS application directory partition of
contoso.com.
What should you do?

A.
From DNS Manager, right-click RODC1 and click Create Default Application Directory
Partitions.

B.
From DNS Manager, create primary zones.

C.
Run ntdsutil.exe. From the Partition Management context, run the create nc command.

D.
Run dnscmd.exe and specify the /enlistdirectorypartition parameter.

Explanation: