You are presented with the question "Computers run when what is working properly?" and the following answer choices: 
- metal forks
 - an engine
 - lowered energy cost
 - deoxyribonucleic acid
 - plastic switches
 - objects that have mass
 - power ballads
 - electrical circuit

Now knowing that when an electrical circuit is working properly , electrical current runs through that circuit and currently computers run on electric circuits and wires, choose the best answer.


 

        electrical circuit 