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").

Input: Consider Input: Fact1: Bivalves feed on plankton and nonliving organic matter., Fact2: Mussels are bivalve mollusks., Question: What feeds on plankton and nonliving organic matter? (A) barnacles (B) mollusks (C) animals (D) the Sun (E) sharks (F) graptolites (G) bacteria (H) dogs

Output: B


Input: Consider Input: Fact1: All cnidarians are aquatic., Fact2: Cnidarians are also called coelenterates., Question: What are aquatic? (A) coelenterates (B) trees (C) lizards (D) angiosperm (E) holding nutrients (F) trees and flowers (G) the Sun (H) humans

Output: A


Input: Consider Input: Fact1: Light enters the eye through an opening called the pupil., Fact2: Light enters the eye through the pupil, and the pupil is made larger or smaller by the iris., Question: What makes the pupil change sizes? (A) electrically (B) sun's heat (C) sweating (D) It expands (E) The iris (F) nerves (G) environment (H) heat


Output: E