Would I have a shot at these agencies?

Hi, I am 13 and I am an aspiring actress. I have 3-4 pretty strong credits and a very good demo reel, headshots and an impressive resume and all. I am in a very good agency now, who is known for commercials, but I would like to get a stronger theatrical agency. Agencies like AEF and Osbrink have given me callbacks. Would I have a shot at: Osbrink, AEF, CESD, Coast to Coast, or possibly Gersh, or any B agency? Thanks!