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: knowledge of the stars can be used to navigate, Fact2: Of course, astronomers also study stars., Question: What can be used to navigate? (A) music (B) backbones (C) astrology (D) cilia (E) magic (F) sponges (G) astronomy (H) lamphreys

Ex Output:
G


Ex Input:
Fact1: staying warm has a positive impact on an animal 's survival, Fact2: Furry animals grow thicker coats to keep warm in the winter., Question: Furry animals grow thicker coats which has what impact on their survival? (A) heat (B) positive (C) negative (D) energy (E) ironic (F) Energy. (G) decreased (H) adding heat

Ex Output:
B


Ex Input:
Fact1: Pregnancy is the carrying of one or more offspring from fertilization until birth., Fact2: Mothers choose to have sex, which leads to pregnancy., Question: To what stage do mothers carry offspring from fertilization to? (A) birth (B) mitosis (C) puberty (D) the Sun (E) A Child (F) adult (G) gametes (H) breasts

Ex Output:

A