听力原文：W: Can I see your license and registration please？
M: What's the matter, officer. Did I do something wrong？
W: You were speeding.
M: I was speeding？
W: You certainly were. Do you have any idea how fast you were going？
M: I'm not sure, but I would think I was going about 35.
W: This street is in a 25-mile-per-hour speed zone, you know.
M: It is？
W: In this state, the speed limit in residential areas is 25 unless otherwise posted. Besides, there are signs all along the streets.
M: I'm sorry, officer, I guess I didn't notice. I was thinking about my job interview. I'm on my way to it right now and I hadn't planned to come this way.
W: What do you mean？
M: Well. I was coming down on Elm Street but the traffic was really backed up. There was some kind of construction going on. I turned onto a side street and ended up here. Give me a break. I'm nervous enough as it is.
W: Well, since you have an interview, I’ll give you a warning this time. But keep your eye on the speedometer from now on, whether you're on a street you are familiar with or not.
Why does the officer think the man should notice the speed limit？

A. Speed limits are the same in all areas,
B. She'd told him what it was.
C. There are signs along the road.
D. He has recently received his driver's license.