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: 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: high pressure systems cause clear weather, Fact2: High barometric pressure indicates clear weather., Question: What causes clear weather? (A) our nearest star (B) electromagnetic energy (C) looseness of dirt or compost (D) Animal survival (E) The area was once underwater (F) evaporation (G) barometric pressure (H) windpower operated machines

A:
G
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