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: if an animal sweats then that animal 's bodily water decreases, Fact2: Most of the time, sweating can reduce body-heat., Question: Reducing body-heat can also decrease an animal's what? (A) Quality of life (B) prolactin release (C) Bodily water (D) Heart rate (E) heat energy (F) Weight (G) Temperature (H) energy

Ex Output:
C

Ex Input:
Fact1: hydropower requires damming a river, Fact2: Another source of energy is hydropower., Question: What is a source of energy? (A) fossil fuels (B) cooking (C) damming a river (D) sleeping (E) napping (F) Electrical energy (G) our nearest star (H) sunlight

Ex Output:
C

Ex Input:
Fact1: Many corals secrete an exoskeleton that builds up to become a coral reef., Fact2: Good examples are Bubble coral, Elegance coral, Frogspawn and other Euphyllia corals., Question: What is secreted by organisms like frogspawn to become a reef? (A) exocrine glands (B) food and shelter (C) exoskeleton (D) bones (E) Energy (F) Chemical energy (G) plasma (H) Energy.

Ex Output:
C