This is my third time asking this i need some

I would say the answer is C, because we know according to the law of conservation of energy that "energy cannot be created or destroyed" but can be conserved and/or converted.

Sorry I couldn't answer sooner, I didn't see your other 2 posts... Hope this helps you ;) -BG

in 1783 cavendish was working with his hydrogen gas and found that when he burned it and condensed the vapor it was water. this was very significant since it disproved the greek theory of elements completely since water was not a simple substance but the product of two gases. it was lavoisier who hearing of the experiment gave cavendish's gas the name hydrogen ("water-producer") and added that hydrogen burned by combining with oxygen and that water was a hydrogen-oxygen combination.

explanation: