【单选题】

Man: It’s your own fault. You shouldn’t let anyone in unless you are expecting him.Woman: It’s all very well to say that, but someone comes to the door saying "electricity" or "gas" while presenting you a card, and you automatically think he is OK.Question: What does the woman mean

A、It’s her fault to let in the stranger without the slightest suspicion.
B．The man’s blame on her isn’t fair.
C．She is credulous and ready to believe anything people tell her.
D．It is easier said than done.