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: ultraviolet light causes sunburn, Fact2: Furthermore, sunburn can cause premature aging and skin cancers., Question: What can ultraviolet light cause? (A) chemical changes (B) Cold skin (C) killing insects (D) Healthy skin (E) disease (F) Skin cancer (G) symptoms (H) Low temperatures
Example Output: F

Example Input: Fact1: a greenhouse is used to protect plants from the cold, Fact2: If it's too cold, some plants freeze and die., Question: What organisms are most likely to be saved in the winter by a greenhouse (A) snow leopards (B) dormant (C) plants (D) tiny (E) skiiers (F) whales (G) heat (H) mussels
Example Output:
C