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: Cells are the basic units of the structure and function of living things., Fact2: All cells use glucose for energy., Question: What do all living things use for energy? (A) fish (B) kids (C) energy (D) glucose (E) The Sun (F) procreation (G) sunlight (H) food

A: D
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Q: Fact1: threatening behavior by predators causes a porcupine to extend its quills, Fact2: Puffers are smooth skinned while Porcupines have the characteristic spines or quills., Question: What does a porcupine do with its spines when it's threatened? (A) killing insects (B) Shoot them (C) kill them (D) protect them (E) Extend them (F) Shed them (G) Retract them (H) behave

A: E
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Q: Fact1: a tape measure is used to measure length, Fact2: All lengths shown are in inches., Question: What is used to measure inches? (A) A Greek letter (B) encoded information (C) a granulated cylinder (D) a tape measure (E) an external framework (F) a barometer (G) a hydraulic system (H) a graduated cylinder

A:
D
****