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.

Example Input: 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
Example Output: asteroid

Example Input: Sentence: A zebra is forced to run at a slow pace in a zoo, but can run at a fast pace in a field. Question: Which surface has less resistance? (A) field (B) zoo
Example Output: field

Example Input: Sentence: A shopping cart rolls by itself across a parking lot. Then it gets to a field. The cart rolls only a little more after it enters the field. Question: Why does this happen? (A) the parking lot is a rougher surface (B) the field is a rougher surface
Example Output:
the field is a rougher surface