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: fossils are formed when layers of sediment cover the remains of organisms over time, Fact2: Plants and animals are organisms., Question: What forms when plants are covered in layers of sediment over time? (A) Conifers (B) watershred (C) fossils (D) H2O (E) Echinoids (F) bubbles (G) loose soil (H) bones
Example Output: C

Example Input: Fact1: melting means changing from a solid into a liquid by adding heat energy, Fact2: When a substance melts, it changes phase from a solid to a liquid by the application of heat., Question: What can be done to a solid by adding heat energy? (A) massive damage (B) phasing the bubbles (C) It expands (D) cooling the center (E) Evaporation (F) changing the phase (G) removing the air (H) Water expanding
Example Output: F

Example Input: Fact1: heavy rains cause flooding, Fact2: Flooding is problematic because it causes erosion problems., Question: Erosion can be caused by  (A) coastlines (B) mouth of rivers (C) vehicles (D) heavy rains (E) Pesticides (F) deforestation (G) detritus (H) ice wedging
Example Output:
D