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: carpooling decreases the amount of cars used to travel to a place, Fact2: Carpooling cuts down on congestion and pollution., Question: What decreases when we decrease the amount of cars traveling to one place? (A) Temperature (B) Heart rate (C) Climate change (D) Pollution (E) Clean air (F) forces (G) Burning fossil fuels (H) gene flow

Output: D

Input: Consider Input: Fact1: Flowing water can slowly dissolve carbon in sedimentary rock., Fact2: Rivers and streams are bodies of fresh, flowing water., Question: What can slowly dissolve carbon in sedimentary rock? (A) hydrocarbons (B) acetic acid (C) precipitation (D) evaporation (E) rivers and streams (F) puddles (G) ponds (H) nitrogen

Output: E

Input: Consider Input: Fact1: Organisms cluster around hydrothermal vents in the ocean floor., Fact2: Chimneys top some hydrothermal vents., Question: What do organisms cluster around in the ocean floor? (A) kalenchoes (B) ferns (C) bacteria (D) Chimneys (E) an object (F) alveoli (G) graptolites (H) allow growth
Output: D