Which internal DOS command clears the screen and places the DOS prompt in the upper left corner of the screen? A. cls B. close C. quit D. exit E. None of the above

The correct answer is A. cls.

The cls command clears the screen and places the DOS prompt in the upper left corner of the screen. It is an internal DOS command, which means that it is built into the DOS operating system and does not require a separate program to be executed.

The other options are incorrect. The close command closes a file or device. The quit command exits the current program. The exit command exits the DOS operating system.