Which of the following describes the correct process of disaster recovery and Huawei disaster recovery solution?

A: The disaster recovery side to create a snapshotMap the snapshot to the disaster recovery hostDisaster Recovery Host scans the diskStart disaster recovery applicationTest disaster recovery applications B: Forcibly switch the replication relationshipMap lunStart disaster recovery applicationTest application started successfullyResume production business C: Stop production application and dismiss the host mappingSwitch the replication relationshipMap lunStart disaster recovery applicationTest application started successfully D: Release the host mappingSwitch the replication relationshipMap lunStart disaster recovery applicationTest application started successfully