You install Windows Server 2008 R2 Enterprise （Full Installation）. You need to add the Hyper-V role to the server.  What are two possible ways to achieve this goal？（）

• A、Run the start /w hvconfig command.
• B、Run the start /w ocsetup Microsoft-Hyper-V command.
• C、Run the Add-WindowsFeature Hyper-V PowerShell cmdlet.
• D、Run the Add-WindowsFeature RSAT-Hyper-V PowerShell cmdlet.