A three-node cluster experienced a node failure. The resource groups were acquired as cexpected. The node has been repaired，and HACMP has been restarted.  How does the operator determine that the node has successfully re-integrated into the cluster？（）  

• A、 Use the clstat command.
• B、 Use the cIRGinfor command.
• C、 Tail the /etc/hacmp.out file and wait for "node_up_complete" to finish successfully.
• D、 Tail the /usr/es/adm/cluster.log file and wait for "node_up_complete" to finish successfully.