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: Organisms cluster around hydrothermal vents in the ocean floor., Fact2: Background Hot water vents form inside cracks in the ocean floor., Question: Organisms cluster around hot water inside cracks where? (A) loose soil (B) ocean floor (C) food and shelter (D) tectonic plates (E) the ground (F) allow growth (G) Absorb light (H) survive
[EX A]: B

[EX Q]: Fact1: Some touch receptors sense differences in temperature or pain., Fact2: Touch receptors are a type of mechanoreceptor., Question: some mechanoreceptors sense what in temperature? (A) Energy (B) Energy. (C) hunger (D) pain (E) differences (F) kinetic energy (G) heat energy (H) similarities
[EX A]: E

[EX Q]: Fact1: Bottleneck effect occurs when a population suddenly gets much smaller., Fact2: Fire usually causes temporary declines in populations., Question: What can occur in animals after a fire? (A) the population rises (B) Contaminated wounds (C) the population grows rapidly (D) the population fights the fire (E) recovery time from fatigue (F) the bottleneck effect (G) Temperature changing (H) Dehydration
[EX A]:
F