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: an egg requires warmth to survive, Fact2: Inside the egg, the developing rattlesnake is nourished by the yolk of the egg., Question: a developing rattlesnake requires what to survive (A) warmth (B) companionship (C) nutrients (D) shade (E) desert (F) food (G) energy (H) air
Example Output: A

Example Input: Fact1: a glacier causes mechanical weathering, Fact2: Largest of the glacier-formed lakes is Karakul., Question: What can be formed by mechanical weathering? (A) NaCl (B) white (C) rock (D) tube (E) soils (F) Roads (G) Lakes (H) sand
Example Output: G

Example Input: Fact1: a refrigerator is used for keeping food fresh for a long period of time, Fact2: To prevent bacterial food poisoning, the basic rule is to keep hot foods hot and cold foods cold., Question: What prevents cold food from growing poisonous bacteria? (A) Dehydration (B) Cooking (C) a hydraulic system (D) sweating (E) refrigerators (F) fur and fat (G) an electric stove (H) hard outer covering
Example Output:
E