A customer wants to migrate their existing cluster onto new POWER6 hardware， and in addition requires thecluster to be migrated from PowerHA version 5.3 to 5.5. Given that AIX 6.1 and PowerHA 5.5 filesets arealready installed in the new hardware， which of the following methods would allow the customer to maintaintheir current cluster configuration？（）

• A、Add the new nodes to the existing cluster， and perform a rolling migration and remove the original nodesfrom the cluster
• B、Add the new nodes to the existing cluster， and perform a non-disruptive upgrade and remove the originalnodes from the cluster.
• C、Create a snapshot of the existing cluster and apply the snapshot to the new cluster. Start cluster serviceson the new cluster and stop the original cluster
• D、Create a snapshot of the existing cluster and apply the snapshot to the new cluster. Stop cluster serviceson the original cluster and start on the new cluster