Which line from the passage helps to develop the themes? A. "That still looked a little clumsy. You need to keep practicing." B. "You were brave to try, Kieran, but you have to understand that I have your best interests at heart." C. "That incident taught me that while it is good to aim high, never over-step your limitations." D. "Mr. Lang may have been a great gymnast in his time, but not anymore."