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").

Example Input: Fact1: insulated material can be used for keeping warm, Fact2: An insulated cup with a cover is great for keeping beverages warm., Question: How do you keep a cup hot? (A) less water (B) electricity (C) heat energy (D) adding heat (E) energy usage (F) insulation (G) squeeze (H) energy
Example Output: F

Example Input: Fact1: lungs are used for breathing air by land animals, Fact2: Elephants are the largest animals on land., Question: What uses lungs for breathing air? (A) rocks (B) some mammals (C) Frogs (D) monotremes (E) humans (F) bacteria (G) elephants (H) oak trees
Example Output: G

Example Input: Fact1: sediment is formed by weathering, Fact2: All sediments originate from the weathering and erosion of older rocks., Question: What causes sediment to form? (A) soils (B) tectonic plates (C) magnets (D) water (E) rivers (F) wind (G) loose soil (H) erosion
Example Output:
H