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: A a switch turns something with batteies on because: (A) electrons are then disturbed (B) a piece of metal closes the circuit (C) it lets the acid free (D) the circuit is opened

Answer: B


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

Answer: A


Question: A load of dirt, mud, water and debris can come toppling down from a higher place if (A) skies are clear (B) cats are playing (C) leaves are budding (D) weather is poor

Answer:
D