How should an administrator use Cluster Explorer to remove a system from a running service group in a three node cluster with the configuration already opened?

A.
highlight the service group, then select File, System Manager, highlight system, and click on the left arrow

B.
highlight the service group, then select Tools, System Manager, highlight system, and click on the left arrow

C.
highlight the service group, then select View, System Manager, highlight system, and click on the left arrow

D.
highlight the service group, then select Edit, System Manager, highlight system, and click on the left arrow