Which sentences correctly use a colon? Jordan learned how to play many sports at summer camp: volleyball, baseball, lacrosse, and tennis.

Kim’s extensive morning ritual of doing her hair was one she never forgot: it was her most important therapy.
Yesterday at the mall, Clarissa bought two pairs of jeans: four shirts, two pairs of shoes, and one bag.
Alan planned to finish his degree in one semester: he still remembered applying to college years ago.