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: Which is true? (A) glaciers make depressions that water can pool in (B) lions hunt glaciers in the wild (C) glaciers are generally high temperature objects (D) glaciers can change directions rapidly for speed
Example Output: A

Example Input: Obstacles that might impede a dune are (A) God (B) emotions (C) cacti (D) cancers
Example Output: C

Example Input: Sara sorted her marbles into glass ones and marbles made of crystal. This is an example of (A) classifying (B) weighing (C) clarifying (D) justifying
Example Output:
A