Which input device can advanced computer users use instead of a mouse to perform tasks such as opening new windows and saving or deleting files?

A. scanner

B. microphone

C. keyboard

D. joystick

C) the keyboard (by using hot keys or short cuts (like ctrl + s for saving files))

The input device that an advanced computer user uses instead of a mouse to perform tasks such as opening new windows and saving and deleting files is the keyboard. For example, you can use control + save to save files. The correct answer is C.