Your network contains two servers that run the Server Core installation of Windows Server 2008 R2. The two servers are part of a Network Load Balancing cluster. The cluster hosts a Web site. Administrators use client computers that run Windows 7. You need to recommend a strategy that allows the administrators to remotely manage the Network Load Balancing cluster. Your strategy must support automation. What should you recommend？（）

A. On the servers， enable Windows Remote Management （WinRM）.
B. On the servers， add the administrators to the Remote Desktop Users group.
C. On the Windows 7 client computers，enable Windows Remote Management （WinRM）.
D. On the Windows 7 client computers，add the administrators to the Remote Desktop Users group.