Activity List or Resume?

<p>i'm a bit confused about which one i should submit. It says on the UNC app that we're allowed to send in a resume, but i've been seeing lots of posts saying to send in an activity list. So which one is it? Well, which one would UNC prefer?
Oh, another questions while i'm posting this. i've switched high schools three different times so have some inconsistencies in my EC's. Should i use my additional statement to explain that? (i've already written one about Summer Ventures...) And should I put those EC's on my resume/activities list even though I definitely had no way of gaining leadership roles or even continued participation in them?</p>