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: Mating is generally preceded by courtship., Fact2: For example, a black rooster and a white hen mate, and the resulting offspring are gray., Question: What can result in offspring? (A) seeds (B) competition (C) courtship (D) travel (E) resistance (F) solitude (G) litter (H) reading

Ex Output:
C

Ex Input:
Fact1: shelter is used for protection by animals against weather, Fact2: Many animals use sponges for shelter., Question: What can animals use for protection? (A) hair (B) bushes (C) keratin (D) food (E) shells (F) appendages (G) energy (H) sponges

Ex Output:
H

Ex Input:
Fact1: Echinoderms have a unique water vascular system with tube feet., Fact2: Another obvious connection between the eye and the rest of the body is the vascular system., Question: a connection is between the eye and what type of feet in echinoderms (A) tube (B) Seesaw (C) vision (D) made (E) voles (F) a path (G) bones (H) muscle

Ex Output:
A