Which tool should you use?

You perform a Server Core Installation of Windows Server 2012 R2 on a server named Server1.
You need to add a graphical user interface (GUI) to Server1.
Which tool should you use?

A.
The imagex.exe command

B.
The ocsetup.exe commandC. The setup.exe command

D.
The dism.exe command

Explanation:
The DISM command is called by the Add-WindowsFeature command. Here is the systax for DISM:
Dism /online /enable-feature /featurename:ServerCore-FullServer /featurename:Server- Gui-Shell
/featurename:Server-Gui-Mgmt