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: Active immunity results when an immune response to a pathogen produces memory cells., Fact2: Pathogens are germs that cause disease., Question: Active immunity is when an immune response occurs after a germ produces what? (A) harmful substances (B) bioaerosols (C) rapid expansion (D) Allergies (E) anemia (F) it needs them (G) Chemical energy (H) memory cells

A: H
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Q: Fact1: pushing on the pedals of a bike cause that bike to move, Fact2: Bike shoes allow a rider to pull during the whole pedal stroke., Question: pushing with strokes on a bike cause that bike to what (A) Lift (B) bend (C) bounce (D) power (E) move (F) break (G) motion (H) speed

A: E
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Q: Fact1: contact between rocks over long periods of time causes rocks to smooth, Fact2: Smoothed, grooved and polished rocks are produced by glacial erosion., Question: What is erosion? (A) moonlight (B) looseness of dirt or compost (C) permineralization (D) water vapor (E) fog (F) The area was once underwater (G) fissures of hot, acidic water (H) contact between rocks

A:
H
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