Mr.King works in a shop and drives a car for the manager. He drives carefully and can keep calm in time of danger. The manager pays him more.
Mr.Baker, one of his friends, works in a factory outside the city.    As the traffic is crowded in the morning, sometimes he is late for work. He hopes to buy a car, but he hasn't enough money. He chose a beautiful but cheap car. He said he wanted to have a trial（实验）drive, the seller agreed. He called Mr. King and asked him to help him.
At first he drove slowly and it worked well. Then he drove fast. And when he reached a crossing, the light turned red. He tried to stop it, but he failed and nearly hit an old woman.    However, the car went on until it hit a big tree by the road.
What made such a good driver make this kind of mistake?

A. Last week, he decided to buy an old one. B. A policeman told him to stop. C. He thinks it's good to walk to work. D. It is far from his house and he has to go to work by bus. E. Mr. King examined the car at first and then drove it away.