instruction:
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").
question:
Fact1: natural disasters can cause animals to leave an environment, Fact2: Animal migration is mystery of nature., Question: Natural disasters can cause (A) deforestation (B) kill them (C) Pollution (D) disease (E) deadly (F) erosion (G) migration (H) flooding
answer:
G

question:
Fact1: erosion of soil has a negative impact on the environment, Fact2: Much of the landscape is scarred by severe soil erosion., Question: What is scarred by a negative impact on the environment? (A) mines (B) deforestation (C) skin (D) bushes (E) water (F) landscape (G) coastlines (H) clouds
answer:
F

question:
Fact1: Evolution is a change in the characteristics of living things over time., Fact2: Biological evolution is slow, while corporate evolution is fast., Question: What is the speed of the change in the characteristics of living things over time? (A) Jet speed. (B) Speed of light. (C) long (D) Slow. (E) Mach speeds. (F) slows (G) speed (H) years
answer:
D