Anadministratorhasatwo-nodePowerHAclusterinamutualtakeoverconfiguration.Heneedstoupdatefrom5.5servicepack1to5.5servicepack2.Whichofthefollowingactionswillperformtheupdateswithnoriskofdisruptiontoapplicationsrunninginthecluster？（）
A.Unmanageresourcegroupsonallnodes，updatetheclusterfilesets，startclusterservicesonallnodes，ensureclusterservicesstabilize
B.Updatetheclusterfilesetsonallnodes.Run’refresh-sclstrmgrES’ononenode，waitfortheclustertostabilize，repeatforallothernodes
C.Unmanageresourcegroupsononenode，updatetheclusterfilesets，startclusterservices.Waitfortheclustertostabilizeandrepeatforallothernodes.
D.Bringresourcegroups（RGs）onlineonallnodesconcurrently，bringRGsofflineononenode，updatetheclusterfilesets，bringRGsonline，repeatforallothernodes
参考答案：C
