because the batteries conduct the electricity because the batteries supply the energy because the batteries produce light because the batteries produce heat
I gave my students this multiple choice question: Norma's flashlight was not working. She replaced the old batteries with new ones, and the flashlight turned on. Why did the flashlight work after she replaced the batteries?

Only one answer is correct among these 4 choices:
- because the batteries conduct the electricity
- because the batteries supply the energy
- because the batteries produce light
- because the batteries produce heat

Could you tell me which one is correct?

because the batteries supply the energy