Pick your answer from:
[A]. emotion;
[B]. absence;
[C]. murmur;
[D]. energy;
[E]. waves;
[F]. arteries;
[G]. feelings;
[H]. voltage;

Fact 1: Matter vibrating can cause sound. Fact 2: Music is sound, sound is energy. Given the two facts above, vibrating matter can cause music through what?
Answer:
[D].