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: If a person restores a garden complete with oaks, then they have replaced (A) concrete (B) jelly (C) steam (D) a resource
Example Output: D

Example Input: What is one thing cloud precipitation can be? (A) a thunder boom (B) a liquid fire (C) unfavorable weather outlook (D) none of these
Example Output: C

Example Input: The grand canyon was formed by the colorado river doing what over a long period of time? (A) vaporizing (B) evaporating (C) freezing (D) circulating
Example Output:
D