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").

Input: Consider Input: Adding something poisonous to an environment and harming it is called what? (A) dirtying (B) liking (C) cleaning (D) observing

Output: A


Input: Consider Input: A person wants their yard to be a wonderful ecosystem for local wildlife. They consider doing a few things in order to facilitate this, but ultimately decide that the best way to make a great impact is to (A) make some more money (B) plant a wet rope (C) plant a blue spruce (D) sing to their flowers

Output: C


Input: Consider Input: Falcons reside best in (A) volcanoes (B) Scottish moors (C) tar pits (D) ocean trenches


Output: B