You work as a systems administrator at ABC.com. The ABC.com network has a forest with a domain named ABC.com. All servers on the ABC.com network have Windows Server 2008 R2 installed and all workstations have Windows 7 installed.

You are responsible for managing a stand-alone server named ABC-SR05. You are in the process of configuring ABC-SR05 as an Enterprise certification authority (CA). You now want to assign the Active Directory Certificate Services (AD CS) role to ABC-SR05. However, you notice that you cannot select the Enterprise CA option.

What action should you take configuring ABC-SR05 as an Enterprise CA?

A.
Your best option would be to first configure ABC-SR05 as a Standalone CA.

B.
Your best option would be to first have ABC-SR05 joined to the ABC.com domain.

C.
Your best option would be to first install Internet Information Services (IIS) on ABC-SR05.

D.
Your best option would be to first assign the Active Directory Certificate Services (AD CS) role to ABC-SR05.