单项选择题

You install Windows Server 2008 R2 Enterprise(Server Core Installation).You need to add the Hyper-V role to the server.
Which command should you run?()

A.start /w hvconfig
B.start /w ocsetup Microsoft-Hyper-V
C.start /w ServerManagerCMD Cinstall Hyper-V
D.net start " hyper-v virtual machine management "