Given the task definition and input, reply with output. In this task, you're given a context passage, followed by a question that needs to be answered. Based on the paragraph, you must write unambiguous answers to the questions and your answer must refer to a specific phrase from the paragraph. If multiple answers seem to exist, write the answer that is the most plausible.

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 didn't seem to ease his mind .
Question: What may have caused Lavender to laugh at Dom ?
He made a snarky quip .