She made an excuse and left , dragging Colin out behind her , closing the door with a wink that required her to use every muscle in her face . " Not very subtle , is she ? " Dom asked when the door was safely closed behind her . Lavender shook her head and laughed , though it did n't seem to ease his mind .

Question: What may have caused Lavender to laugh at Dom ?
Answer: He closed the door on her .He made a snarky quip .None of the above choices .Lavender made a snarky quip at him .