A、She didn’t know her daughter could sing so well. B、She thinks that she sings better than her daughter. C、She doesn’t like her

M: If I ever see that guy again, I’m definitely going to tell him a thing or two.
W: Take it easy. Remember, our policy is that the customer is always right. You don’t want to argue with a customer even if you think you are absolutely right.
Q: What can be inferred about the man?

M: I heard your daughter sing at the school concert last night. She has a lovely voice, I must say.
W: Thank you, but I don’t know where she gets it.
Q: What does the woman probably mean?