The correct answer is C. UNDELETE.
The UNDELETE command is used to recover deleted files in MS-DOS. It can be used to recover files that have been deleted from the hard drive, floppy disk, or network drive.
To use the UNDELETE command, you must first know the name of the file that you want to recover. You can then use the UNDELETE command to recover the file.
The syntax for the UNDELETE command is:
UNDELETE filename
For example, to recover the file “myfile.txt”, you would use the following command:
UNDELETE myfile.txt
If the file is recoverable, it will be restored to its original location. If the file is not recoverable, you will receive an error message.
The UNDELETE command is a powerful tool that can be used to recover deleted files. However, it is important to note that the UNDELETE command can only recover files that have been deleted recently. If a file has been deleted for a long period of time, it may not be possible to recover it using the UNDELETE command.
The other options are incorrect because they are not valid commands in MS-DOS.