Final answer:
The correct answer is C) headphone. Input devices are used to input data or commands into a computer, while output devices are used to receive or display the processed information from the computer.
Step-by-step explanation:
The correct answer is C) headphone. While a microphone, scanner, and keyboard are all input devices, a headphone is an output device.
Input devices are used to input data or commands into a computer, while output devices are used to receive or display the processed information from the computer.