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: Evolution is a change in the characteristics of living things over time., Fact2: Evolution relies on random chance acts to cause mutations., Question: What causes changes in characteristics of living things over time? (A) mutations (B) science (C) parents (D) environment (E) light energy (F) news (G) alleles (H) animals

Output: A


Input: Consider Input: Fact1: All chemical reactions require activation energy to get started., Fact2: Fire is a chemical reaction., Question: What does fire require to get started? (A) an engine (B) activation energy (C) water (D) energy usage (E) direct energy (F) dogs (G) activated almonds (H) adding heat

Output: B


Input: Consider Input: Fact1: Muscle contraction occurs when muscle fibers get shorter., Fact2: Injury occurs as the muscle is being stretched while the muscle fibers are being contracted., Question: What happens when the muscle is stretched while fibers are shorter? (A) rest (B) decreases (C) Broken bone (D) Injury (E) abrasion (F) forces (G) Warmth (H) Muscle repair

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Output: D


