A、Salesman and customer. B、Expert on jewelry and his wife. C、Estate agent and client. D、Husband and wife. Dthe house we are now

M: I am really getting worried about Mary. She .will sit in for an exam in two weeks time. But all she is talking about now is nothing but the upcoming concert.
W: She may fail along that line. Let’s try to talk some sense into her.
Q: What are the speakers probably going to do?

M: I’m not really an expert on precious stones, but these are superb. Do you like them?
W: Have you looked at the price tag? It costs almost twice as much as the house we’re now living in.
Q: What is the probable relationship between the two speakers?