Q: In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").
Fact1: electric devices require electrical energy to function, Fact2: Electrical energy refers to energy associated with the flow of electrons., Question: What uses the flow of electrons? (A) Typewriters (B) hydrogen and oxygen (C) an electron microscope (D) Electric devices (E) Manual devices (F) Bodies of water (G) circulatory systems (H) an electron lens
A:
D