A printer is a/an:

Choose all which apply.

a) input device

b) output device

c) data storage device

d) operating system

4 answers

... and you think it's ... ?
Yes, if you're referring to just a printer.

An all-in-one is different, though.
What’s different about an all-in-one? Because that’s actually what they ask.
An ordinary printer = output only (the printed pages)

An all-in-one (printer, scanner, copier, and sometimes fax) prints (output), but also is a way to input data ... by scanning documents, photos, etc., and saving the images on your hard drive.