Which of these is true in regards to deleting a file from a file system on a Cisco catalyst 6500 series supervisor engine 7207?

Which of these is true in regards to deleting a file from a file system on a Cisco catalyst 6500 series supervisor engine 7207?

A.
The file is permanently deleted from a supervisor bootflash using the delete command

B.
The squeeze command must be used in compactflash to permanently delete a file

C.
The undelete command is used to undelete a file on a boot disk

D.
The squeeze command is used to reclaim the space of deleted files on supervisor bootflash