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: coal is used for generating heat by burning, Fact2: Coal and lignite are the lithified remains of plants., Question: What are the lithified remains of plants used for? (A) heat production (B) generating heat by burning (C) harvesting crops (D) damming rivers (E) food and shelter (F) heat is produced (G) A transportation fuel (H) planting seeds

Ex Output:
B


Ex Input:
Fact1: Wings are part of the exoskeleton and attached to the thorax., Fact2: Insects have exoskeletons., Question: What is attached to insects' thorax? (A) sugar (B) Energy. (C) antennae (D) Energy (E) wings (F) nothing (G) food (H) pancreas

Ex Output:
E


Ex Input:
Fact1: Chordates have a complete digestive system and a closed circulatory system., Fact2: Because reptiles are vertebrates, they are chordates., Question: what kind of circulatory system do reptiles have? (A) open (B) systemic (C) complex (D) dense (E) cold (F) three (G) closed (H) organ

Ex Output:

G