Your company has an Active Directory forest. You plan to install an Enterprise certification
authority (CA) on a dedicated stand-alone server.
When you attempt to add the Active Directory Certificate Services (AD CS) server role, you
find that the EnterpriseCA option is not available.
You need to install the AD CS server role as an EnterpriseCA.
What should you do first?

A.
Add the DNS Server server role.

B.
Add the Active Directory Lightweight Directory Services (AD LDS) server role.

C.
Join the server to the domain.

D.
Add the Web Server (IIS) server role and the AD CS server role.