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: Plasma cells are activated B cells that secrete antibodies., Fact2: Antibodies are produced by plasma cells., Question: antibodies are produced by activated B cells that do what? (A) Animal survival (B) killing insects (C) interact (D) secrete them (E) migrate (F) reproduce (G) competition (H) Allergies

A: D
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Q: Fact1: Cells are the microscopic building blocks of organisms., Fact2: Plants and animals are organisms., Question: What are cells in plants and animals? (A) production of energy (B) absorb light energy (C) large building blocks (D) sub-units of species (E) cellulitis (F) microscopic bulding blocks (G) disease (H) microorganisms

A: F
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Q: Fact1: a vehicle is used for travel, Fact2: Vehicle emissions are a major cause of air pollution., Question: What is a cause of air pollution? (A) death (B) oxygen (C) oxidation (D) traveling (E) swimming (F) bacteria (G) Thunderstorms (H) rain

A:
D
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