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: pathogens can cause disease, Fact2: Mad Cow disease is a concern., Question: What can cause Mad Cow? (A) Pollution (B) bacteria (C) cows (D) horses (E) illness (F) pathogens (G) influenza (H) chickenpox
[A]: F


[Q]: Fact1: Plants live just about everywhere on Earth., Fact2: Snakes live almost everywhere on earth., Question: Plants and snakes live _. (A) almost everywhere (B) important habitats (C) hydrate their cells (D) reproduce (E) more abundant (F) competing for resources (G) the environment (H) vegetation
[A]: A


[Q]: Fact1: energy is used for heating a building by a heating system, Fact2: Passive solar thermal energy involves heating buildings using direct sunlight., Question: A method of heating a building might be what? (A) dangerous (B) Blizzards (C) Heated arguments (D) threatened (E) major threat to health (F) Direct sunlight. (G) Mothballs (H) slow and inefficient
[A]:
F