Instructions: 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").
Input: Fact1: a warm front causes cloudy and rainy weather, Fact2: Warm air moving into an area of cold air is called a warm front ., Question: What causes cloudy and rainy weather? (A) Cold air forming fog (B) a hemisphere is tilted away from the sun (C) Warm air near the oceans (D) Breathing too fast or too slow (E) Cold winds near the mountains (F) Warm air moving into cold air (G) Earth's axis of rotation is tilted (H) extreme heat and pressure
Output:
F