A.Thepreemptoptiondeterminestheprimaryandsecondaryrolesforredundancygroup0duringafailure andrecoveryscenario.
B.Whenprioritysettingsareequalandthemembersparticipatinginaclusterareinitializedatthesame time，theprimaryroleforredundancygroup0isassignedtonode
C.Theprimaryrolecanbesharedforredundancygroup0whentheactive-activeoptionisenabled.
D.Redundancygroup0managesthecontrolplanefailoverbetweenthenodesofacluster.
参考答案：D
