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: a mirror is used for reflecting light, Fact2: Light seems to travel in rays or beams., Question: what can a mirror be used to reflect? (A) noble gases (B) air particles (C) glass (D) focusing a lens (E) rays or beams (F) photons (G) sun's heat (H) an electron lens
Example Output: E

Example Input: Fact1: the Himalayas were formed by rock folding, Fact2: If the rocks are not as brittle, they will either tilt or fold., Question: What is the consistency of the Himalayan rocks? (A) crust (B) Loose (C) simple (D) cold (E) loose soil (F) Smooth (G) liquid (H) Brittle
Example Output: H

Example Input: Fact1: decomposition increases amount of organic matter in soil, Fact2: Organic mulch improves the soil., Question: What improves the soil? (A) decomposition (B) erosion (C) green manures (D) evaporation (E) fire (F) nutrients (G) dehydration (H) water conservation
Example Output:
A