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: 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
[EX A]: A

[EX Q]: Fact1: Nonmetal elements are far fewer in number., Fact2: Elements to the right of the semiconductors are Nonmetals., Question: Elements to the right of the semiconductors are far what in number? (A) size (B) hole (C) fewer (D) eight (E) calcium (F) several (G) solid (H) shells
[EX A]: C

[EX Q]: Fact1: treating water is used to remove harmful substances before drinking, Fact2: Boiling is the safest method of treating water., Question: What can be done to water to remove harmful substances before drinking? (A) evaporation (B) vaporization (C) Dipping a magnet into it (D) hydration (E) Mixing in heavy metals (F) Cooking (G) Boiling it (H) Adding purified water to it
[EX A]:
G