单项选择题

W: Peter, could you tell me if I have mistaken your pen or not
M: As far as I know, it is similar to the one I bought last week.
W: Really What a coincidence!
M: Yeah, Rose, so please take care of it. I am sure you will like it!

Does the woman mistake the pen()

A. Yes, it’s Peter’s.
B. Yes, it’s someone else’s.
C. No, it’s Rose’s.
D. Yes, it’s Rose’s.