Final answer:
A printer, monitor, and headphones are considered output devices because they output data in the form of print, visual display, and audio respectively.
Step-by-step explanation:
The question asks which three devices are considered output devices. Output devices are peripherals that allow a computer to communicate with the user by outputting data in various forms, like visual, audio, or physical format. Among the options provided, the correct answers are:
- Printer (a): It converts digital documents into physical papers, which is a form of output.
- Monitor (c): It displays images and text on a screen, which are visual outputs.
- Headphones (e): They output sound waves that can be heard by the user.
The keyboard and fingerprint scanner are not output devices but rather input devices; they are used to enter data into the computer, not to get data out of it.