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: If something is in an ecosystem, it could be (A) invisible (B) vacuum of space (C) lacking life (D) alien

Output: C


Input: Consider Input: Sound pulses helps dolphins (A) satisfy women (B) find God (C) find nourishment (D) find ibexes

Output: C


Input: Consider Input: Being stronger has what impact on a creatures health? (A) bad impact (B) unexpected complications (C) minimum effect (D) good influence


Output: D