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 seismometer is used to measure the strength or magnitude of an earthquake, Fact2: Earthquakes are measured on a scale of 1 to 10., Question: How do we grade earthquakes (A) Seisometers (B) Cladistics (C) feedback (D) Measuring the ground (E) Check out the sky (F) classified (G) Taking temperature (H) the Himalayas
Example Output: A

Example Input: Fact1: an egg requires warmth to survive, Fact2: First the frog lays the eggs, then the warmth from the sun makes the eggs hatch into baby tadpoles., Question: what keeps eggs warm? (A) ice (B) hair (C) wool (D) bears (E) fur (F) sun (G) moss (H) sand
Example Output: F

Example Input: Fact1: a plant requires photosynthesis to grow, Fact2: Carbohydrates in plants are formed by photosynthesis., Question: What are formed in plants? (A) hydrogen and oxygen (B) coded genes (C) nucleus of a cell (D) Carbohydrates (E) Organic compounds (F) circulatory systems (G) organic molecules (H) tiny polyps
Example Output:
D