In a Manual Recovery Process, Which of the Following Operations

In a manual recovery process, which of the following operations is not required? (Multiple choice.)

A) Stop the current production business, delete the host mapping.
B) Adding the remote device to the original production side array.
C) With the disaster recovery array as the master LUN and the original production array as the slave LUN, create the remote replication relationship between the DR and the production end and wait for the initial synchronization to be completed.
D) Make an incremental synchronization.
E) Delete the original production array consistency group.