article: John and Jack met at the old bench every afternoon. Then they played football. But they didn't have enough money to buy a real football. So Jack made a ball out of old socks covered with a piece of plastic. Every time, the two friends didn't stop kicking and running until very late.
  On Monday afternoon, John and Jack met again at the old bench. Soon the home-made ball was running across the grass. The boys laughed and shouted happily. The ball was stopped by a boy wearing a nice pair of sports shoes. John was upset when he saw it was Steven.
  The next morning, John's mother gave him a bill. "Your uncle sent you a birthday present." She smiled. John's eyes grew big when he saw the $100 bill. Later that day, his mother bought a pair of new sports shoes and a real football.
  That afternoon Steven invited John to play football. Steven did not want Jack to join them only because Jack's sports shoes were dirty. When the game was over, John and Steven walked past the old bench where Jack was sitting. Steven picked up a stone and threw it at him. John, holding his new football in his hands, walked on and did not look back.
  Several days later, as John walked past the old bench, he saw something lying under it. He looked closer and saw it was the home-made ball. John was full of sadness when he saw the ball. As his sadness turned to anger, he picked up his new football and kicked it into the air. Then he walked to the beach, sat down and waited.
question: Why didn't Jack play football with John and Steven?
options: Because he was ill. Because he hated Steven. Because he didn't wear sports shoes. Because he wasn't invited by Steven.