You are configuring a DL720 with Active Engine Failover. During the night, when most of the backups are running, one of the engines fails. What is the result?

A.
Resources of the failed engine move to the working one. All I/O going to the failed engine are directed to the working one through the write cache.

B.
WWPNs of the failed engine move to the working one. Active backups are redirected to another engine.

C.
Resources of the failed engine move to the working one. All I/O going to the failed engine are directed to the working one through the CMI.

D.
WWPNs of the failed engine move to the working one. Active backups to the failed engine fail.