instruction:
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").
question:
Which of the following has a population of zero? (A) Merriam's elk (B) bison (C) llama (D) whooping crane
answer:
A


question:
Sunlight is a source of (A) wind energy (B) warmth (C) frigid temperatures (D) moonlight
answer:
B


question:
Because it's less dense, water floats on top of (A) honey (B) vegetable oil (C) our insect overlords (D) water
answer:

A