To copy the hidden system files of DOS to another disk you can use the command

To copy the hidden system files of DOS to another disk, you can use the command Sys. The Sys command in DOS is used to transfer the system files (including hidden and system files) from one disk to another. It allows you to make a disk bootable by transferring the necessary system files.

Option A, "Copy," is used to copy files, but it does not specifically handle hidden system files or make a disk bootable with system files.
Option B, "Ren," is used to rename files or directories.
Option D, "Diskcopy," is used to copy the entire contents of one floppy disk to another, but it does not handle hidden system files specifically.

Therefore, the correct answer is Option C: Sys.