阅读下列短文,从各题所给的A、B、C和D项中选出最佳选项。
Muhammad Ali was born in the United States in 1942. Today, many people think he was the most talented boxer in the world. They call him "The Greatest of All Time". However, few people know how he became a boxer. The story is unusual.
When Ali was a little boy, somebody stole his bike. Ali cried and told a police officer. The police officer was also a boxing coach. He asked Ali if he wanted to learn how to box. Ali said yes. He wanted to learn how to box because if he ever met the person who stole his bike, he wanted to beat him up! Ali probably never found his bike, but that was a very important day in his life. It was the day he started boxing.
Ali became very successful right away. He wasn't just strong. He was also very fast and smart. In the 1960 Olympics, he won a gold medal for the USA. After that, he became the heavyweight champion of the world. In total, Ali won fifty-six professional boxing matches, and lost only five.
Ali wasn't just a great boxer. When Ali was the champion, the United States was fighting a war in Vietnam (越南). Many Americans thought the war was wrong. The government tried to make Ali join the army. Ali said no. He thought that the war was wrong, so he didn't fight in it. Ali was punished. He was not allowed to box, and he lost a lot of money. However, he didn't care. He still refused to go to Vietnam. Finally, Ali was allowed to return to boxing. He soon became the champion again.
Muhammad Ali always did the right thing. He stopped fighting more than 30 years ago, but people around the world still love him.