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: the Earth being tilted on its rotating axis causes seasons, Fact2: Latitude and season cause temperature variations., Question: What causes yearly temperature variations? (A) earth's rotation (B) scattered light (C) earth's bend on rotating axis (D) exposure to cold (E) depress neuronal excitability (F) earth's tilt on rotating axis (G) wind and erosion (H) earth's tilt on rotating half
A:
F