How should replication be configured to allow NetBackup to recover client backup data from the DR site in the event the Data Domain at the production site goes offline?

A customer has an EMC Data Domain integrated into their Symantec NetBackup domain as an OST device at their production site. They are installing a new NetBackup media server and a second Data Domain at their disaster recovery (DR) site to protect their client backup images.

How should replication be configured to allow NetBackup to recover client backup data from the DR site in the event the Data Domain at the production site goes offline?
A . Perform snapshots of the NetBackup image directories and replicate those snapshots to the DR site
B . Configure NetBackup to duplicate the images between the Data Domain OST devices
C . Configure MTree replication from the production site to the DR site
D . Use fastcopy at the production site to make a copy of the NetBackup images and replicate them to the DR site

Answer: B