Which command is used to undelete delete a bunch of files with extension doc that you have just deleted

The undelete command in DOS is used specifically for recovering deleted files.
Using *.doc after undelete specifies that only files with the ".doc" extension should be considered for recovery.

This command is useful when you have accidentally deleted multiple files with the ".doc" extension and wish to restore them.

Undelete:
While undelete alone initiates the undelete process, it requires specifying the file extension or name pattern to recover specific files.

Undelete/all:
There is no /all option for the undelete command in DOS. This option does not exist.

All of the above:
This option is incorrect because only Option B (Undelete *.doc) accurately describes the command to undelete files with a specific extension.

Therefore, the correct answer is Option B: Undelete *.doc.