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: fog is formed by water vapor condensing in the air, Fact2: Water vapor rises into the atmosphere., Question: what does the atmosphere do before turning into fog (A) adapt (B) rest (C) Rise (D) fall (E) cooled (F) snow (G) swirl (H) Lift

A: C
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Q: Fact1: mechanical weathering is when rocks are broken down by mechanical means, Fact2: Water is a mechanical weathering force., Question: What  weathers rocks? (A) soil (B) streams (C) a delta (D) calcite (E) erosion (F) water (G) grass (H) the sun

A: F
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Q: Fact1: predicting weather requires studying weater, Fact2: Meteorologists try to predict the weather., Question: what does being a meteorologist require? (A) Warmer temperatures (B) homeostasis (C) calibrated (D) rain (E) precipitation (F) studying weather (G) meteors (H) Seisometers

A:
F
****