A、Doctor and patient. B、Employer and employee. C、Seller and buyer. D、Teacher and student. B男士说他正在考虑给女士升职，女士则说她已经得到了一份更好的工作邀请。由此可

M: John just called in sick.
W: In my memory he has never asked for sick leave.
Q: What can we learn from the conversation?

M: I am thinking about promoting you.
W: To be honest, I’ve got a better offer.
Q: What is the probable relationship between the two speakers?