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: In order for trees to use sunlight they must (A) their roots (B) the light switch (C) CPR (D) respire
Example Output: D

Example Input: A dog's ears may be as thin as its (A) friend's (B) neighbor's (C) father's (D) owner's
Example Output: C

Example Input: A guy is trying to choose a spot to build his house. He chooses a place that will cause the least environmental change in an area, so he builds in (A) a town (B) a jungle (C) a desert (D) a forest
Example Output:
A