Which command is used to copy files?

Answer: Option A

In Disk Operating System (DOS), the command used specifically to copy files is Copy. The Copy command in DOS allows users to copy one or more files from one location to another.

Option B, "Diskcopy," is used to copy the entire contents of one floppy disk to another and is not used for copying individual files.
Option C, "Type," is used to display the contents of a text file.

Therefore, the correct answer is Option A: Copy.