根据短文内容，从题中所给的A、B、C、D四个选项中，选出正确答案。
Many people think heroes(英雄) need to be handsome, rich, or very smart. But as for me, a hero is a person who always helps others. My hero is Uncle Bill. He is the oldest son of a worker, and he grew up in a poor family with four younger brothers and two little sisters.
He was good at neither writing nor maths. In fact, he never did well in school. So he had to give up school at a very young age. He worked and gave all his money to help his parents. When he was getting older, he found that he was very interested in fixing things. He collected broken things which people threw away and fixed them. He could fix almost everything that did not work. He worked hard and never gave up. Finally, he opened his own repair shop. It took him about twenty years to become a successful shopkeeper.
Now, he is very wealthy and has four shops. But he never forgets the days when he had nothing. He gives money to poor families, helps poor kids buy books and offers them free lunch. He also encourages people to reuse things. He always says, "Make good use of what you have because we just have one earth."
I am proud of Uncle Bill. He is really a hero.