$25-$year$-$old Angie knows how to swim, but she hasn't done it for several years. Angie decides to start swimming at the Natatorium for exercise. According to social comparison theory, which "reference group" will best help Angie maintain an accurate and positive self concept?

a swim club of women in their $20$ s who swim to get in shape

any would make a good reference group, but for different reasons

the university's competitive swimmins team

a class for college students who are just leaming to swim