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 has a population of zero? (A) Merriam's elk (B) bison (C) llama (D) whooping crane

Answer: A


Question: This can be used to light up a light bulb (A) grass (B) dirt (C) stones. (D) biofuel

Answer: D


Question: What are you unlikely to find in a canyon? (A) granite (B) sandstone (C) squid (D) limestone

Answer:
C