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").

[Q]: 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.
[A]: C

[Q]: Fact1: disease-causing microbes have a negative impact on the body, Fact2: Water was tested for the presence of disease-causing microbes., Question: Water that is not what can have a negative impact on the body? (A) salinity (B) chemicals (C) sweat (D) an object (E) tested (F) deadly (G) dangerous (H) dead
[A]: E

[Q]: Fact1: Most ecosystems get energy from sunlight., Fact2: On Earth, energy from sunlight heats the atmosphere more at the equator than at the poles., Question: Most ecosystems get energy from what in the atmosphere? (A) fires (B) Sun (C) wind (D) summer (E) oxygen (F) Light (G) heat (H) H20
[A]:
G