Which activities to list?

I know you all can't answer this for me, but for people who were heavily involved in UG - I mean serious involvement for 2+ years with 5+ organizations, how are you deciding which 3 to list? And if you'd like to weigh in on what you think I should list (to present a balanced app), please do

One spot is already locked (sophomore - senior year, 5 hrs/wk), but the other two are up for grabs. I won't go into too much detail but the gist is:

A) I am debating if I should list one that was a community involvement position(at the University level, although some events did involve the surrounding community) and yet a part time job as well. This position required 10 hours a week and was a high visibility, highly sought after leadership position. Accomplished a lot - seriously. This was junior & senior year

B) Board member of affinity group, led many projects, high visibility leadership role, community service oriented. 2 - 5 hours a week, freshman - sophomore year

c) Tutor/mentor through a campus organization, had big impact on my mentee, spent two years working with her, freshman - sophomore year, 2-3 hrs a week

Both A & B are linked to a particular community, whereas C is a more general activity. The one activity I've already chosen to list is also within the same community, thus the problem of seeming one-dimensional. B & C aren't on my resume as I chose to list some other roles that I knew I did not want to list on the written app. Even between the resume and app, I feel there are a lot of activities that I have to leave off that I was involved in for multiple years.