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: Flowing water can slowly dissolve carbon in sedimentary rock., Fact2: Rivers and streams are bodies of fresh, flowing water., Question: What can slowly dissolve carbon in sedimentary rock? (A) hydrocarbons (B) acetic acid (C) precipitation (D) evaporation (E) rivers and streams (F) puddles (G) ponds (H) nitrogen
[A]: E


[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: if an object is black then that object absorbs all visible light, Fact2: Nature of Light Light is a form of energy., Question: If an object is what color, it absorbs all visible energy? (A) dormant (B) black (C) prism (D) a wave (E) white (F) forever (G) unique (H) rainbow
[A]:
B