I worked for a short time as a cashier at a restaurant a few months ago. I also helped to clean up the tables when it was very busy. One night, just before Christmas, I found a large black wallet on the floor near one of the tables. I guessed I should check it to find out who was the owner, but I was very busy at the time. And I imagined that if there was something valuable in the wallet, the owner would be back. Sure enough, an hour later a man came up to the counter and asked if anyone had found a wallet. l asked him to describe the lost wallet, and after he described it exactly, I gave him the wallet. He expressed his thanks when I handed it to him. He asked me if I had opened it, and when I told him “no”. At once he opened it and showed that it had nearly $800 in cash. He took out a twenty-dollar bill and handed it to me and I was amazed at this. “A reward for your honesty,” he said and then turned and walked away.

Thinking about it later, I began wondering whether I would have been honest if had known what was in the wallet! I thought that if I had no way to find the owner and no one returned to get it, I might keep it. But it also came into my mind that I actually saved someone's Christmas plans by finding and returning the wallet. The good feeling it gave me was worth more than anything could buy.

Which of the following is true?（　　）

• A.The owner of the wallet found a twenty-dollar bill gone
• B.The writer wasn't surprised when the man gave her a reward
• C.Nothing in the wallet was missing
• D.The man was very, very excited when he got his wallet back