Rochester Writing Sample (What are they looking for?)

I was thinking of submitting a writing sample but I wasn’t too sure of what to pick. Would a grade practice essay from my AP Lang. and Comp. class suffice? Or should I use something else? I have a research paper on the Nuremberg Trials I wrote sophomore year but I might need to spruce it up a bit. Thoughts?
thnx

I think it kind of depends on what you’re planning on majoring in. I got in ED for mechanical engineering and I submitted an ap physics lab report that I had written earlier in the school year. But, I think that if your teacher graded your essay then you should be fine.