What happens when an EMC NetWorker file type device becomes full while backups are running?

What happens when an EMC NetWorker file type device becomes full while backups are running?
A . Backups are paused; the oldest save sets are staged.
B . Backups span to another volume.
C . Backups fail; simultaneous restore jobs continue.
D . Backups are paused; aborted and expired save sets are deleted.

Answer: B