Which command is used to clear the screen

In Disk Operating System (DOS), the command used to clear the screen is Cls. This command clears the console screen, removing all previous commands and output, and displays the command prompt at the top of the screen.

Option B, "Clear," is not a valid DOS command for clearing the screen. It is commonly used in Unix-like systems.
Option C, "Clscreen," is not a valid DOS command.

Therefore, the correct answer is Option A: Cls.