You are presented with the quiz "Computers run when what is working properly?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "when an electrical circuit is working properly , electrical current runs through that circuit" and "currently computers run on electric circuits and wires". So, what's the best answer to the question?
Select from:
(1). metal forks.
(2). an engine.
(3). lowered energy cost.
(4). deoxyribonucleic acid.
(5). plastic switches.
(6). objects that have mass.
(7). power ballads.
(8). electrical circuit.
Answer:
(8).