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: transportation technology is used for moving people, Fact2: Model rocketry is an exciting way to study transportation technology., Question: Model rocketry can be used to study how people are what? (A) able to read (B) warm (C) dead (D) living (E) moved (F) born (G) humans (H) moved by emotion

Ex Output:
E

Ex 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

Ex Output:
B

Ex Input:
Fact1: Many corals secrete an exoskeleton that builds up to become a coral reef., Fact2: Coral is made of the exoskeletons of many thousands of tiny marine animals called polyps., Question: Coral reefs are made up of the exoskeletons of thousands of what? (A) Absorb light (B) scarce resources (C) Chlorophyll (D) tiny polyps (E) to stay warm (F) animals (G) salt and water. (H) graptolites

Ex Output:
D