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: Evolution occurs in response to a change in the environment., Fact2: Extinction is a natural part or the process of evolution., Question: What happens to an environment to cause extinction?  (A) relocation (B) changes (C) rain (D) exposure (E) forces (F) wind (G) Pollution (H) discovery

Ex Output:
B


Ex Input:
Fact1: Fertilization takes place inside the female organism., Fact2: Each eyed egg is a fertile egg., Question: What do female organisms produce? (A) honey (B) electricity (C) apples (D) nectar (E) plants (F) eggs (G) anger (H) adults

Ex Output:
F


Ex Input:
Fact1: a sandbar is formed by water moving sediment downstream, Fact2: Bare sandbars are the ideal spots for new stands of cottonwood., Question: What is required for the ideal habitat for new stands of cottonwood? (A) sunlight (B) nutrients (C) warmth (D) Sediment (E) Black tar (F) Hot magma (G) trees (H) Chainsaws

Ex Output:

D