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: A plastic toy reduced to a puddle was left on a (A) steep mountain (B) iceberg (C) government propaganda flick (D) hotplate
Example Output: D

Example Input: In order for crops to grow food safely pesticides are used on them. When it floods, this can cause what to be poisonous? (A) Corn (B) air (C) Runoff (D) farmers
Example Output: C

Example Input: The earth revolves around (A) a heat source (B) the Milky Way (C) a neighboring planet (D) the moon
Example Output:
A