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 delta is formed by deposition of sediment at the mouth of a river by water fanning out, Fact2: Rivers provide a water supply., Question: What is formed by deposition of sediment at the mouth of a water supply fanning out? (A) a hurricane (B) soils (C) a delta (D) an ocean (E) soft soil (F) an island (G) detritus (H) spring
Example Output: C

Example Input: Fact1: a plant requires photosynthesis to grow, Fact2: Legumes are typical of that type of plant., Question: what requires photosynthesis to grow? (A) Roundworms (B) clouds (C) Conifers (D) Echinoids (E) humans (F) h2o (G) legumes (H) sugar
Example Output: G

Example Input: Fact1: melting means changing from a solid into a liquid by adding heat energy, Fact2: Melting is a phase change., Question: What changes a solid into a liquid using heat energy? (A) electricity (B) It gets heated up (C) boiling (D) aqueous solution (E) a phase change (F) a hydraulic system (G) heating liquids (H) Water expanding
Example Output:
E