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").

Example Input: What are some of the risks of using fertilizer? (A) Making potatoes (B) Helping food grow (C) Fertilizing the crops (D) Damaging the planet
Example Output: D

Example Input: An example of replacing a natural resource like copper might be (A) recovering ores (B) running around (C) throwing up (D) using plastic straws
Example Output: A

Example Input: if the surface of our planet is different after a while, what could have happened? (A) the surface eroded on its own (B) all of these (C) there were natural occurrences (D) man has damaged the surface
Example Output:
B