You need to setup a Read-Only Domain Controller (RODC) on the Server Core installation computer in the branch office

ABC.com has a main office and a branch office. ABC.com’s network consists of a single
Active Directory forest.
Some of the servers in the network run Windows Server 2008 and the rest run Windows
server 2003.
You are the administrator at ABC.com. You have installed Active Directory Domain Services
(AD DS) on a computer that runs Windows Server 2008. The branch office is located in a
physically insecure place. It has no IT personnel onsite and there are no administrators over
there. You need to setup a Read-Only Domain Controller (RODC) on the Server Core
installation computer in the branch office.
What should you do to setup RODC on the computer in branch office?

A.
Execute an attended installation of AD DS

B.
Execute an unattended installation of AD DS

C.
Execute RODC through AD DS

D.
Execute AD DS by using deploying the image of AD DS

E.
none of the above

Explanation:
http://technet.microsoft.com/en-us/library/cc754629.aspx
Install an RODC on a Server Core installation
To install an RODC on a Server Core installation of Windows Server 2008, you must perform
an unattended installation of AD DS.