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: telephones are used for communication by two people by transmitting sound, Fact2: And the sound of their voice becomes important as well., Question: What is transmitted with telephones? (A) voice (B) copper (C) waves (D) smell (E) cancer (F) energy (G) HIV (H) power
[A]: A


[Q]: Fact1: volcanic ash in the atmosphere decreases the temperature by blocking the sun, Fact2: Supersaturation is inferred to be a common state for atmospheric haze particles., Question: What decreases the temperature by blocking the Sun? (A) cilia (B) the Sun (C) the wind (D) haze (E) ice (F) fat (G) rain (H) acids
[A]: D


[Q]: Fact1: dehydrating food is used for preserving food, Fact2: Preservatives Preservatives are required to prevent spoilage., Question: What can prevent food spoilage? (A) prolactin release (B) one celled organisms (C) hydrating food (D) cleaning food (E) airing out food (F) Electric generators (G) a hydraulic system (H) dehydrating food
[A]:
H