A Storage Checkpoint is created with the command:
fsckptadm -R create thu_8pm /data1
Which statement about this checkpoint is correct if the file system runs out of space?

A.
It can only be removed manually because it is a non-removable checkpoint.

B.
It is removed even if it is mounted.

C.
This and all subsequent checkpoints are recursively removed.

D.
It is removed only if the checkpoint is unused.