M: Have you seen my school bag, Mom? I've been looking for it everywhere. W: I hope you didn't leave it in school. You never know where you put your things. When did you last see it? M: Last night before I went to bed, I think. I remember putting it on the desk. W: Really? If you put it there, it should still be there. No one has been to your room. So it must be here somewhere. M: Yes, but where? That's what I want to know. Oh, dear, it's about the time for the school bus. W: Hey, what's that under your blanket at the foot of your bed?, Question: What is the relationship between the two speakers? (A) They are brother and sister. (B) They are mother and son. (C) They are husband and wife.
(B) They are mother and son.