Answer the following question: Fact 1: Afirecracker converts chemical energy into sound. Fact 2: Sound waves are vibrations in matter. Given the two facts above, a firecracker converts chemical energy into what?

Options are: A). kinetic energy. B). electromagnetic energy. C). An object is seen. D). vibrations in matter. E). objects that have mass. F). harmful substances. G). The bending of a ray of light. H). Loud noises.
Answer:
D).