阅读下列短文,从每题所给的A、B、C和D四个选项中,选出最佳选项。Billy Ray Harris was homeless. He spent each day on the streets of Kansas City, begging for money or food. Every day, as he sat thinking about his life, he occasionally heard the sound of a coin or two coming into his cup. One day, the noise was louder than usual. If Billy had looked up, he'd have seen a young lady on her way to work. But he didn't. Later when he looked into the cup, he could hardly believe what he saw. At the bottom was a shining diamond ring.
Billy's first thought was to go straight to a jeweller's(珠宝店) and that's exactly what he did. To his amazement, he was offered $4,000. Billy thought long and hard. Was this a mistake? It was more money than he'd seen in a long time. But then he thought about his grandfather, who had brought him up always to do the right thing, and knew he had to reconsider. His mind was made up. He'd keep the ring and maybe one day its owner would return.
Two days later, a young woman came while he was begging. She introduced herself as Sarah Darling and asked if he'd found anything unusual in his cup. Billy reached into his pocket and pulled out the ring. When he saw the smile on her face, he knew he'd made the right decision. She explained when putting the coins into his cup, she'd forgotten putting her ring in her purse.
But the story doesn't end there. Sarah told her husband the story and wanted to post it on the Internet. He thought it was a good idea. They also called on raising money for Billy. They had more than $185,000. Billy Ray Harris no longer spends his days begging. He has a home and a job. The story also made the local news and he was reunited with his two sisters, who he hadn't seen for 16 years. If he hadn't done the right thing, he wouldn't have seen his sisters again.