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 Q]: Fact1: Caffeine is a central nervous system stimulant., Fact2: Cocaine is a stimulant and increases the user's heart rate and blood pressure., Question: What does caffeine do? (A) Increase fame (B) increases a body's strength (C) Release energy (D) Increase user's heart rate (E) Transfers energy (F) decrease stamina (G) Increase intelligence (H) Increase wealth
[EX A]: D

[EX Q]: Fact1: condensing means changing from a gas into a liquid by reducing heat energy, Fact2: When a gas condenses to form a liquid it absorbs heat., Question: What does reducing heat change gas into? (A) water (B) solutes (C) energy (D) rock (E) sweating (F) tube (G) liquid (H) freon
[EX A]: G

[EX Q]: 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
[EX A]:
D