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: In the 60's people watched on TV while for the first time people walked on (A) a high rooftop in a major city (B) a satellite without much air in our solar system (C) the edge of a cliff in the mountains (D) a beach in Brazil

Output: B


Input: Consider Input: If you fly from Europe to Australia in December, when you arrive you will most likely want to wear: (A) heavy coat (B) mittens (C) shorts (D) ski mask

Output: C


Input: Consider Input: The planet got warmer and warmer, and now the atmosphere is warm as well with the greenhouse effect (A) holding elements near (B) locking acid in (C) locking in dogs (D) gassing in carton


Output: A