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").
Q: Fact1: some light bulbs convert electricity into light and heat energy, Fact2: Since the purpose of a light bulb is to generate light, the heat is wasted energy., Question: What type of energy generated by the bulbs is wasted? (A) warmth (B) stored (C) motion (D) light (E) oil (F) heat (G) sugar (H) mostly
A:
F