Certkiller .com has a main office and a branch office. Certkiller .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 Certkiller .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 not 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