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: Some viruses can cause cancer., Fact2: Cancer is an example of a mutation in cells., Question: What can mutate cells? (A) Allergies (B) water (C) fruits (D) flow of electrons (E) vegetables (F) harmful substances (G) rays or beams (H) some viruses
[A]: H


[Q]: Fact1: Evolution occurs in response to a change in the environment., Fact2: Evolution Evolution is the changing pattern of life forms., Question: what happens in response to change in environment? (A) Plant growth is reduced (B) the wearing away of rock (C) lifeforms change their pattern (D) antimatter (E) density changes (F) Warm air moving into cold air (G) erosion from rivers (H) gravity changes
[A]: C


[Q]: Fact1: a breathing mask is used for keeping harmful particles from entering the respiratory system, Fact2: Air pollution is caused by the build-up of harmful gases and particles in the air., Question: What does a gas mask keep out? (A) disease (B) The atmosphere (C) heat energy (D) air pollution (E) energy barrier (F) Bodily water (G) Dehydration (H) bacteria
[A]:
D