Should I do a resume or CV?

I'm applying to a program and it gives the option of doing a resume or CV. Since there is no interview and my GPA isn't the best, I was thinking of doing a CV so I could bring focus to my volunteer and work experience. However, I also don't have a lot of that so it wouldn't fill up a traditional CV. What should I do?

[llg, PhD, RN]

It doesn't matter. Either way, your credentials are what they are. The format you choose won't be the deciding factor. So choose the one you are most comfortable with -- the one that you feel highlights your strong points best.