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: coal is used for generating heat by burning, Fact2: Coal and lignite are the lithified remains of plants., Question: What are the lithified remains of plants used for? (A) heat production (B) generating heat by burning (C) harvesting crops (D) damming rivers (E) food and shelter (F) heat is produced (G) A transportation fuel (H) planting seeds
Example Output: B

Example Input: Fact1: a light bulb converts electrical energy into light energy when it is turned on, Fact2: Light bulbs are rated in Watts., Question: How is converted energy into light energy rated? (A) energy (B) unique (C) heat (D) good (E) watts (F) parsec (G) kilojoule (H) kinetic energy
Example Output: E

Example Input: Fact1: Mating is generally preceded by courtship., Fact2: Normally, however, insect pheromones function to attract mates for reproduction., Question: What uses pheromones for courtship? (A) bears (B) insects (C) fur seals (D) phytoplankton (E) bacteria (F) viruses (G) mammals (H) bees
Example Output:
B