Tisch Film Creative Portfolio - Just one 3 minute film, or 3 shorts, totalling 9 minutes?

I am applying to Tisch for Film production. I am wondering if it is best to submit just one short film (3 minutes) for the video submission, or 3? I would think more would show them my range, but I have a vague recollection of someone telling me just one is better. Anyone have any personal knowledge? I am submitting this weekend, so need to know quickly!