To copy the hidden system files of DOS to another disk you can use the command A. Copy B. Ren C. Sys D. Diskcopy

The correct answer is D. Diskcopy.

The command diskcopy is used to copy the contents of one floppy disk to another. This includes the hidden system files of DOS.

The command copy is used to copy files from one location to another. However, it does not copy hidden files by default. To copy hidden files, you must use the /h switch.

The command ren is used to rename files. It does not copy files.

The command sys is used to copy the system files of DOS to a floppy disk. However, it does not copy any other files on the disk.

Therefore, the correct answer is D. Diskcopy.