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").
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Question: 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

Answer: E


Question: Fact1: the emission of sulfur dioxide causes acid rain, Fact2: The sulfur dioxide is converted into sulfuric acid., Question: what causes acid rain? (A) gases (B) rainfall (C) Pollution (D) fossil fuels (E) emissions (F) vehicles (G) burning (H) wind

Answer: E


Question: Fact1: sand dunes are formed by the wind transporting and depositing sand, Fact2: Aeolian erosion of sand in the desert is partially responsible for the formation of sand dunes., Question: What are factors in the creation of formations in the desert? (A) scattered light (B) the pyramids (C) global warming (D) Physical weathering (E) salinity (F) tombs (G) Sahara (H) wind and erosion

Answer:
H