Select from the following.
a). cucumbers
b). cells
c). computers
d). humans
e). minerals
f). human computers
g). consumers
h). adding heat
Given those answer options, answer the question: You are presented with the quiz "Electricity is used for energy by what?" But you don't know the answer, so you turn to your teacher to ask for hints. He says that "electricity is used as an energy source by electrical devices" and "of course, computers are electronic devices, and as such, they deal in electrical terms". So, what's the best answer to the question?
A:
c).