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: The shape of a hummingbird's beak is an adaptation for (A) getting to hard to reach wood (B) getting to hard to reach females (C) getting to hard to reach rocks (D) getting to hard to reach nutrients
Example Output: D

Example Input: Sunlight can (A) make eyes more visible (B) bounce from a rod (C) create a real problem (D) blind a garden gnome
Example Output: B

Example Input: What do humans do to poison the air? (A) tailoring old clothing items (B) using a plastic bottle to create a self water for a plant (C) placing plastic into big lakes (D) using old T-shirts to make a blanket
Example Output:
C