Detailed Instructions: 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.
Problem:Sentence: Janna was playing with her softball and her bowling ball. She noted that the bowling ball had a greater mass than her softball. Question: Which ball had stronger gravity? (A) softballl (B) bowling ball
Solution:
bowling ball