An administrator will be performing a PowerHA upgrade on a cluster from version 5.3 to version 5.5. Which ofthe following tasks will verify a successful migration？（）

• A、Use the clstat command and verify the cluster is in a stable state
• B、After each node is upgraded， run a verification and synchronization
• C、After all nodes are upgraded， run a verification and synchronization
• D、Take a snapshot of each node and verify the configuration is the same