You created a backup using a file system snapshot. Now that the backup is done, you can delete the snapshot and remove the backing store file.
If you forget which backing store file is in use, which command can provide you with this information?

A.
/usr/sbin/fssnap

B.
/usr/lib/fs/ufs/fssnap

C.
/usr/sbin/mount

D.
/usr/sbin/df