C. “The students who would end up the best in their class began to practice more than everyone else: six hours a week by age nine, eight hours a week by age twelve, sixteen hours a week by age fourteen, and up and up…”
Explanation:
This is the only sentence from the excerpt that supports the idea that more practice is better since it leads to greater success. This is shown since the statement says that the students that were the best, ended up practicing more than everyone else.
