You work as the network administrator at ABC.com. The ABC.com network has a forest with a domain named ABC.com. ABC.com has its headquarters in London and branch office in Paris. All domain controllers on the ABC.com network have Windows Server 2008 R2 installed and function as DNS servers.

Two domain controllers named ABC-DC01 and ABC-DC02 are located in the London office while a Read-only Domain Controller (RODC) named ABC-DC03 is located in the Paris office. All three domain controllers are configured as Active Directory-integrated zones that support secure updates only.

What action should you take to allow ABC-DC03 to support dynamic DNS updates?

A.
You should consider having ABC-DC03 the Read-only Domain Controller (RODC) reconfigured to allow dynamic updates.

B.
You should consider having the dnscmd/ZoneResetType command run at the command prompt on ABC-DC03.

C.
You should consider having an active partition created and configured on ABC-DC01 to store the Active Directory-integrated zones.

D.
You should consider having Active Directory Domain services uninstalled in ABC-DC03. You should then re-install Active Directory as a writeable domain controller.

Explanation:
In order to enable the dynamic DNS updates on ABC-DC03 you need uninstall the Active Directory Domain services on ABC-DC03. Thereafter you can reinstall it as a writeable domain controller. A writeable domain controller performs originating updates and outbound replication.

Reference: http://msdn.microsoft.com/en-us/library/cc207937.aspx