only release energy only absorb energy neither absorb nor release energy sometimes release and sometimes absorb energy depending on the oil
I gave my students this multiple choice question: When oil is burning, the reaction will

Only one answer is correct among these 4 choices:
- only release energy
- only absorb energy
- neither absorb nor release energy
- sometimes release and sometimes absorb energy depending on the oil

Could you tell me which one is correct?

only release energy