Given the task definition and input, reply with output. You are given a sentence, a question and two answer options ('A' and 'B'). Your task is to find the correct answer (return the string of the correct option, not 'A' or 'B') for the given question.

Sentence: A spaceship explores the moon and later explores an asteroid. The moon is several times more massive than the asteroid. Question: Which celestial body will the spaceship have an easier time escaping due to its lower force of gravity? (A) asteroid (B) The Moon
asteroid