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 compass is used to navigate oceans, Fact2: And to the east is the Atlantic Ocean., Question: what is a compass used to navigate? (A) density (B) lamphreys (C) marine (D) outer space (E) their speed (F) Antarctica (G) non-magnetic planets (H) the Atlantic
Example Output: H

Example Input: Fact1: Behaviors that improve fitness increase through natural selection., Fact2: Fitness traits relate to an animal s ability to survive and reproduce., Question: behaviors increase through what that improve traits of animal's ability to survive (A) competition (B) hunting (C) biological diversity (D) the environment (E) eating (F) produce offspring (G) natural selection (H) grooming
Example Output: G

Example Input: Fact1: when a river floods , that river deposits soil in flood plains, Fact2: When the river is full, it floods into the flood plain and leaves behind fertile soil., Question: Where do plains get soil from? (A) earth (B) hurricanes (C) Sediment (D) ocean (E) canyons (F) wind (G) climate (H) floods
Example Output:
H