The correct answer is A. UNDELETE.
UNDELETE is a DOS command that can be used to recover accidentally deleted files. It does this by searching the disk for the deleted files and then restoring them to their original location.
DELETE/CANCEL is a DOS command that can be used to delete files. However, it does not provide any way to recover deleted files.
RESTORE is a DOS command that can be used to restore files from a backup. It does not provide any way to recover accidentally deleted files.
RECOVER is a DOS command that can be used to recover data from a damaged disk. It does not provide any way to recover accidentally deleted files.
Here are some additional details about the UNDELETE command:
- UNDELETE can only be used to recover files that have been deleted recently.
- UNDELETE can only recover files that have not been overwritten by new data.
- UNDELETE can only recover files that have not been damaged by a disk error.
If you have accidentally deleted a file, you should use the UNDELETE command as soon as possible. The longer you wait, the less likely it is that UNDELETE will be able to recover the file.