DRESSED

I was shopping in Anthropologie last week. You may remember that Anthropologie is where I bought the nightgown I wore during the Summer of 2007. Don't worry, I still wear it. I just know it's a nightgown now.

Anyway, while browsing in Anthro, I found myself once again looking at the nightgown/loungewear rack thinking they were dresses. Son of a gun. So my question is this: what makes it a nightgown and what makes it a dress? It's not the material, so what is it? Pricing? Quality of craftsmanship? So today, we're going to play a game.

According to Anthropologie.com, Is It a Dress, or Is It a Nightgown?

Item A:
Item B:
Item C:
Item D:
Item E:
Item F:
Item G:
Item H:Don't cheat! Just cast your votes in the comment section, guessing which you think are dresses and which are nightgowns. By the way, I labeled all the pictures as Dress A, Dress B, etc., so don't go thinking that's a clue. Answers will come tomorrow!