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: Playing is just one of many ways that mammals and other animals learn how to behave., Fact2: Acting is about behaving., Question: What is one of the ways that mammals and other animals learn how to act? (A) sleeping (B) Movement (C) mating (D) exercise (E) eating (F) sound (G) playing (H) motion
[EX A]: G

[EX 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
[EX A]: E

[EX Q]: Fact1: soil is formed by rocks eroding, Fact2: Rivers erode the rocks they flow over., Question: What do rivers do to rocks? (A) storing water (B) to move people (C) they bend (D) Make them get bigger (E) It has no effect on rocks (F) Polish them (G) Turn it to soil (H) protect them
[EX A]:
G