阅读下列短文,从每题所给的四个选项(A、B、C、D)中选出最佳选项。
The summer vacation started on June 26th. Jerry wanted to find a job in the city. One day he saw an advertisement(广告) in a window. It said, "Wanted: The best salesman(推销人员) in the world. Top Pay."
"I'm a great salesman," Jerry said to himself. "I'm sure that I can sell anything. I'll go in and ask for that job."
So Jerry went into the building. He saw a manager in it. He said to the manager, "Good morning. I saw your advertisement. I think I'm the best salesman in the world. Give me the job, please."
"You must prove(证明)that you're the best," the manager said.
"I'll pass every test that you give me," Jerry said.
"Good," the manager said, and he took a box of sweets out of his desk. "Last week I bought a thousand boxes of the sweets. If you can sell them all before the end of the week, you can have the job."
"That's easy," Jerry said.
He took the boxes of sweets and left the office.
Every day and all day he went from shop to shop, trying to sell boxes of the sweets. But he couldn't sell one. The sweets were so bad that he couldn't even sell them.
At the end of the week, he went back to the manager. "I'm sorry, sir," he said. "I was wrong about myself. I'm not the best salesman in the world, but I know who is."
"Oh," said the manager. "Who do you think is the best?"
"The person who sold you a thousand boxes of the sweets."