What should you do?

You are employed 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 contains a headquarters and numerous remote locations. However, the users in the remote location logs on to their own site, however, security can be a problem. You need to sort out this problem.
What should you do?

A.
The best option is to install a Domain controller.

B.
The best option is to install a Global Catalog.

C.
The best option is to install a Read-only domain controller.

D.
The best option is to install a Universal Group Membership Caching Server.

Explanation:
A read-only domain controller (RODC) provides an organization with the capability to have a domain controller installed in an area or setting (on or offsite) where security is a factor.