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: How can it be shown that an electrical conductor is a vehicle for the flow of electricity? (A) holding an electrified fence can kill you (B) electricity is unable to conduct well through rubber shoe soles (C) sticking a fork into an electrical outlet is safe if it is plastic (D) electricity is a volatile thing

Output: A


Input: Consider Input: Pollution is (A) throwing a gum wrapper in the ocean (B) trees in a forest (C) Fish swimming in the sea (D) The wind carrying seeds

Output: A


Input: Consider Input: Which would be considered exhaustible? (A) solar (B) oil (C) wind (D) water


Output: B