A、The police. B、A bee-keeper. C、A beeper. D、The poor motorist. B信息明示题。由文中第三段划线部分可知，一个养蜂人将蜂后找出并带走了蜂群，解决了困扰这个司机的问题，所以B正确。

Hidden passengers traveling in ships, trains, or even cars can be a terrible nuisance, especially when they are insects. In this respect, there is a great difference between human ’beings and insects. The former make every possible effort to avoid discovery, while the latter quickly draw attention to themselves.
     We can only sympathize with the unfortunate man who had to stop his car soon after setting out from a country village to drive to London. Hearing a strange noise from the back of the car, he naturally got out to have a look. He examined the wheels carefully but as he found nothing wrong, he continued on his way. The noise began almost immediately and now it was louder than ever. Quickly turning his head, the man saw what appeared to be a great black cloud following the car. When he stopped at a village further on, he was told that a queen bee must be hidden in his car as there were thousands of bees nearby.
     On learning this, the man realized that the only way to escape would be to drive away as quickly as possible. After an hour’s hard driving, he arrived in London where he parked his car outside a hotel and went in to have a drink. It was not long before a customer who had seen him arrive hurried in to inform him that his car was covered with bees. The poor motorist telephoned the police and explained what had happened. The police decided that the best way to deal with the situation would be to call a bee-keeper. In a short time, the bee-keeper arrived. He found the unwelcome passenger hidden near the wheels at the back of the car. Very grateful to the motorist for his unexpected gift, the keeper took the queen and her thousands of followers home in a large box. Equally grateful, file motorist drove away in peace, at last free from the "black cloud" which had hung over his car.