After you back up /export using a file system snapshot, and you remove the snapshot, you also need to remove the backing store. The snapshot was created with:
# mkdir /var/tmp/backup-snaps
# fssnap -o bs=/var/tmp/backup-snaps /export
Which file do you need to remove?

A.
/var/tmp/backup-snaps

B.
/var/tmp/backup-snaps/snapshot0

C.
/var/tmp/backup-snaps/snapshot

D.
/var/tmp/backup-snaps/0