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: Teenage Mary and her grandmother, Millie, are both gymnasts. Both are talented athletes, even though Millie is getting a little stiff in her later years. Question: Between senior Millie and young Mary, which one is more at risk for broken bones? (A) Mary is more at risk (B) Millie is more at risk
Millie is more at risk