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: 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
[EX A]: E

[EX Q]: Fact1: Cancer is a disease in which cells divide out of control., Fact2: Cancer is also caused by a mutation., Question: What can mutations lead to in which cells divide out of control? (A) Smoking (B) resistance (C) a disease (D) viruses (E) AIDS (F) bacteria (G) Leptospirosis (H) cigarettes
[EX A]: C

[EX Q]: Fact1: Molecules of tRNA bring amino acids to the ribosome in the correct sequence., Fact2: Amino Acids Amino acids are the building blocks of proteins., Question: What brings the building blocks of proteins to the ribosomes in the correct sequence? (A) recycling (B) flow of electrons (C) Chemical energy (D) it needs them (E) an engine (F) light energy (G) A computer (H) molecules of tRNA
[EX A]:
H