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: a breathing mask is used for keeping harmful particles from entering the respiratory system, Fact2: Pulmonologists treat lungs and respiratory systems., Question: what does a breathing mask keep harmful particles from entering? (A) skin (B) tissue (C) stomach (D) h2o (E) H20 (F) air (G) lungs (H) gas masks
[A]: G

[Q]: Fact1: Ozone depletion results in higher levels of UV radiation reaching Earth., Fact2: Birds live on Earth, trees live on Earth., Question: what results in higher levels of uv radiation reaching the place birds and trees live? (A) emissions (B) earthquakes (C) oxidation reaction (D) ozone depletion (E) global warming (F) important habitats (G) fairies (H) the ozone layer strengthening
[A]: D

[Q]: Fact1: refracting sunlight causes sunlight to split into different colors, Fact2: Refraction Refraction is the bending of light rays., Question: what causes sunlight to split into different colors? (A) bending of light rays (B) focusing a lens (C) converting electricity to heat (D) increasing electrons (E) reflections (F) heat energy (G) adding h2o (H) an electron lens
[A]:
A