article: For this little boy,it was the coldest winter.In that winter,his father lost a leg in an accident. He couldn't go out to work again.From then on,his father became another person. He often lost his temper and beat him.
  One night, the boy was walking slowly lonely on the street. He passed a lovely small shop, He looked at some nice packages  of coffee quietly for a long time. An idea came into his mind .He knew his father loved coffee and he knew stealing was no good.But all he could think of was his father's smile.He soon put a package of coffee into his jacket and ran back home.He gave the coffee to his father,who gave a smile that the boy had missed for so long.But,unfortunately,before his father could taste the coffee,the shopkeeper broke in and caught the boy. His father beat him again.
  Years later, he became a successful businessman. One day, his mother called and said his father wanted to see him. Busy working, he refused. Weeks later, he heard the sad news that his father had _ . When he went through the relics  ,he found an old box.Inside the box was the coffee that he had stolen from the shop.On the cover was his father's handwriting:"The gift from my son."There was also a letter:"Dear son,I'm a failure as a father.  But I also have a dream--to own a coffee shop, where I can make cups of coffee for you. I'm sorry I didn't make it."
  Sadness suddenly occupied him. He regretted not meeting his father for the last time, and decided to complete his father's dream. After quitting his own job, he started a coffee business.
  The coffee business is now a huge success. And the little boy is Howard Schultz--the owner of the multinational corporation Starbucks.
question: Why did the boy's father become a different person?
options: Because the boy didn't study very hard. Because he lost a leg and couldn't support the family. Because he lost an arm in an accident. Because it was the coldest winter.