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: A light using energy can cease that activity when (A) light bulbs are gold (B) lights are always on (C) wall switch is adjusted (D) walls are painted blue

Output: C


Input: Consider Input: harming an animal species causes that animal 's population to do what? (A) explode (B) rise (C) plummet (D) burst

Output: C


Input: Consider Input: An animal can use what to help find a partner (A) social networking and dating apps (B) beautiful vibrant tail plumage (C) asking animal friends for advice (D) meet ups and social gatherings


Output: B