A customer reports that their EMC Data Domain system is running out of space. They manually removed many
fast copies from their system. However, this has not increased available space on the system.
What else must be done to regain space used by fast copies?

A.
Run file system cleaning to reclaim space

B.
Remove the MTrees that contain the fast copies

C.
Expire the fast copies when they are removed

D.
Expire and remove the snapshots that were used to create the fast copies