What should you do?

You work as an enterprise administrator at Domain.com. The Domain.com network consists of a single Active Directory domain named Domain.com. All servers on the Domain.com network run Windows Server 2008. Domain.com has its headquarters in Chicago and a branch office in Dallas.
You are in the process of deploying a read-only domain controller named CERTKILLER-DC05 in the Dallas office. You receive an instruction from the CIO to allow all users located at the Dallas office access to CERTKILLER-DC05. You are also informed to notify those users to make use of CERTKILLER-DC05 to log onto the domain.
What should you do?

A.
This can be accomplished by having a new RODC added at the Chicago office.

B.
This can be accomplished by making use of the Password Replication Policy on CERTKILLER-

C.
This can be accomplished by having a new bridehead server installed and configured in the Dallas office.

D.
This can be accomplished by installing and configuring a Password Replication Policy on the new RODC in the Chicago office.

Explanation:
DC05.
You should use the Password Replication Policy on the RODC. This will allow the users at the Dallas office to log on to the domain with RODC. RODCs don’t cache any user or machine passwords.