In this task, you are given a multiple-choice question and you have to pick the correct option. Answer with option indexes (i.e., "A", "B", "C", and "D").
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Question: Which of the following would have best aided a vessel at sea in crossing the sea in the 18th century? (A) A radar system (B) An old soothsayer (C) An experienced navigator (D) A crow's nest

Answer: C


Question: Birds sometimes eat what? (A) grass (B) underground crawlers (C) insecticide (D) trees

Answer: B


Question: The crust under everyone's feet is (A) a tribe of human-like beings that live underground (B) the best pizza crust around (C) the ice that forms in cold regions (D) the outer covering of the third planet from the sun

Answer:
D