Read the following conversation and answer the question.

M: Excuse me, I'm trying to do some work. I'm afraid your children are making a lot of noise. Don't they ever go to sleep?

W: I'm sorry. They are noisy. But you know it's difficult to keep boys quiet.

M: I couldn't work and I couldn't sleep at night. And I was woken by the noise they made early this morning.

W: I'm terribly sorry. You know they never listen to me. They're only afraid of their father. He's away on business, but he will be back tomorrow.

M: I hope he can do something about it.

Question: What is the probable relationship between the two speakers? 

- They are parent and teacher.

- They are close friends.

- They are neighbors.


They are neighbors.