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").

Ex Input:
Fact1: eyes are used for seeing by animals by sensing light, Fact2: Goats are four legged animals., Question: what uses eyes for seeing by sensing light? (A) pigeons (B) goats (C) potatoes (D) tigers (E) plants (F) h2o (G) humans (H) bears

Ex Output:
B

Ex 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

Ex Output:
B

Ex Input:
Fact1: natural disasters can cause animals to leave an environment, Fact2: Flooding is the most common natural disaster., Question: Flooding can cause what to leave an environment (A) fish (B) animals (C) ducks (D) plants (E) threatened (F) kill them (G) Sediment (H) coastlines

Ex Output:
B