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: 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
[EX A]: D

[EX Q]: Fact1: water causes refraction of light, Fact2: Halos are produced by the refraction of light., Question: What causes halos? (A) germs (B) Pacific (C) solutes (D) water (E) storms (F) glass (G) algae (H) the sun
[EX A]: D

[EX Q]: Fact1: the moon revolving around the Earth causes the phases of the moon, Fact2: Phases refer to the different shapes the moon appears from the earth., Question: What causes different shapes of the moon to appear? (A) scattered light (B) Physical weathering (C) reflecting light (D) moon revolving around Earth (E) a hemisphere is tilted away from the sun (F) refract or absorb. (G) oxidation reaction (H) reflect objectstowards the eye
[EX A]:
D