Certkiller .com has a domain controller that runs Windows Server 2008. The Certkiller .com network boosts 40 Windows Vista client machines. As an administrator at Certkiller .com， you want to deploy Active Directory Certificate service （AD CS） to authorize the network users by issuing digital certificates.  What should you do to manage certificate settings on all machines in a domain from one main location（）

• A、Configure Enterprise CA certificate settings
• B、Configure Enterprise trust certificate settings
• C、Configure Advance CA certificate settings
• D、Configure Group Policy certificate settings
• E、All of the above