Mr. Jenkins had a sports car which he liked driving very fast. The problem was that there were speed __41__ on all the roads, but when he thought he could let the car go without __42__ by the police, he did so. One evening Mr. and Mrs. Jenkins were __43__ to a party at the house of some new friends. It was ninety kilometers from their home. They started out, and Mr. Jenkins drove very fast. __44__ they reached their friends’house without any trouble and had a good time at the party. During their return journey, Mr. Jenkins drove very fast again, __45__ it was raining. You’ll have an accident unless you slow down,his wife __46__ him, but he did not listen. Suddenly he heard a police siren just behind him, and the car following him __47__ a blue light. Mr. Jenkins got out of his car angrily and said, Look here, officer, I’m sure that I __48__ carefully just under seventy kilometers an hour. Well,the policeman said, we didn’t stop you __49__ that. But if you were doing nearly seventy kilometers an hour, I’ll have to give you a speeding __50__ , because you’re only allowed to do sixty along this road（）

A.requirements B.controls C.limits D.demands