单项选择题 An administrator has a 2 node cluster running PowerHA version 5.5. They remove a resource group from theactive cluster configuration. When performing a verify and synchronize of the cluster， the administrator getsthe following error： "migcheck[471]： cl_connect（） error， nodename=Node1， rc=-1 cldare： A communication error prevents obtaining the VRMF from remote nodes. A DARE event cannot be run until this is corrected. Please ensureclcomd is running." What is the most likely cause of this error？（）

单项选择题 An administrator believes that the Staging Configuration Directory （SCD） may be locked due to an error in aDARE event. Which of the following commands can the administrator run to check for the existence of locks？（）

单项选择题 An administrator has made several topology and resource group changes on one node in a running cluster.During verification and synchronization， using the "Emulate" option， many errors are reported. Theadministrator decided the best course of action was to roll back the changes. Prior to the changes beingmade， a cluster snapshot was taken. Which of the following actions will roll back the changes with the least disruption？（）