You need to prepare the server to host virtual machines

You install Windows Server 2008 R2 Enterprise on a new physical server. You need to
prepare the server to host virtual machines. What should you do?

A.
Run the Import-Module ServerManager cmdlet.

B.
Run the new-item Hyper-V -type role cmdlet.

C.
Run the servermanagercmd -Install Hyper-V command.

D.
Run the Add-WindowsFeatures RSAT-Hyper-V cmdlet.

Explanation:

http://www.wongchonkit.com/2011/09/installation-option-for-hyper-v-role-in.html