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: 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: a greenhouse is used to protect plants by keeping them warm, Fact2: With lots of rain and a warm climate, plants grow well., Question: What does a greenhouse help plants do? (A) Park cars (B) Start panicking (C) reproduce (D) growth (E) Bloom slower (F) adding heat (G) Regrows it (H) Grow well
[EX A]: H

[EX Q]: Fact1: soil is formed by weathering, Fact2: Rocks breakdown by weathering., Question: What helps soil to form? (A) The planting of flowers (B) The breakdown of rocks (C) organic molecules (D) The changing of seasons (E) Organic compounds (F) swamp vegetation (G) evaporation (H) The movement of clouds
[EX A]:
B