Alyssa and Leila are best friends. Alyssa regularly plays pickleball and is a member of a pickleball club. Leila also wants to join the club, but she is not a very strong pickleball player. Leila decides to start waking up early to practice pickleball so she can participate in the next tournament and become a member of the club. For Leila, the pickleball club can be categorized as which of the following?