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: Oxygen enters the respiratory system through the mouth and the nose., Question: Breathing masks are used to keep harmful particles from entering the mouth and the what? (A) body (B) eyes (C) air (D) skin (E) gullet (F) nose (G) ears (H) lungs

A: F
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Q: Fact1: a delta is formed by deposition of sediment at the mouth of a river by water fanning out, Fact2: Rivers provide a water supply., Question: What is formed by deposition of sediment at the mouth of a water supply fanning out? (A) a hurricane (B) soils (C) a delta (D) an ocean (E) soft soil (F) an island (G) detritus (H) spring

A: C
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Q: Fact1: a speedometer is used for giving a driver feedback on the speed of their vehicle, Fact2: Average vehicle speed rises by only 0.3 miles per hour., Question: What measures miles per hour? (A) visibility (B) a ruler (C) a speedometer (D) tetraceratops (E) lamphreys (F) 295 degrees Kelvin (G) a microscope (H) a barometer

A:
C
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