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: Electron transport is the final stage of aerobic respiration., Fact2: Breathing gets oxygen into the body, but aerobic respiration occurs at the cellular level., Question: That the cellular level, the final stage of breathing oxygen is (A) keeps the organism warm (B) rapid expansion (C) permineralization (D) Plant growth is reduced (E) major threat to health (F) electron transport (G) more abundant (H) flow of electrons
A:
F