I'd have to ask my husband actually what we used, thinking back. It might have been the Option C. It's possible I was getting them mixed up in my head. I just looked at my scanned copy again but I can't actually tell which it is. I remember being confused by that as well when we were getting everything ready to mail. I seem to recall a discussion about that being the Option C but it says "Notice of Assessment" on it, which in my mind makes no sense...though that's neither here nor there.
Either way, I'll ask him when he's awake again and get you a concrete answer on that. Someone else may be able to answer in the meantime.