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 lighter object hue can lead to what? (A) none of these (B) positive charge in electricity (C) a bad electric conduction (D) ability to see yourself in it better
Example Output: D

Example Input: A ship navigates with a magnetic compass because it is (A) predictable (B) unpredictable (C) waterproof (D) tradition
Example Output: A

Example Input: Hummingbirds gather nectar using their (A) bills (B) wings (C) hands (D) feet
Example Output:
A