Jason had been watching the X Games on TV. Athletes from all over the world were competing in the most amazing sports. Just then his grandmother walked into the room. "I want to be extreme. Would you really let me do that? You always worry about my safety!" said Jason. "You will have to follow some rules," said his grandmother. "You can only ride in the park -- never on the streets. You have to promise to wear a helmet  . If you hurt yourself too much, I have the right to take your skateboard away. Is it a deal?" "You bet!" Jason was so excited that he jumped off the sofa. A week later he had a board and a helmet. On Saturday, his grandmother dropped him off near the park. He was happy to have a grandmother who let him try new things. Kids in the park were moving quickly up and down the ramps  . They flew into the air and landed as easily as birds. When he watched the X games, Jason felt like he was doing the tricks himself. But watching these kids up close, he knew that none of it was going to be easy. He felt a little bit scared. Very slowly he carried his board to the ramp. Taking a deep breath, he put his right foot on the board. He kicked off with his left foot. For a few seconds he glided   along, just waiting to fall. Then he came to a stop. Kicking off again, he waited for the worst to happen. Again, he stayed up. The third time he kicked, lost his balance, and fell hard on his left knee. It hurt, but it was no big deal! Why had he been so scared? Now he felt calm because things had gone wrong, and he was fine! Next time he kicked off harder and went fast and farther. "Excellent!" said a girl as she passed him. "Extreme!" laughed Jason to himself. "Not quite." Jason's grandmother agreed to let him try skateboarding unless   _  .
he finished his homework he liked the sport he observed some rules he won a bet
Question: Jason had been watching the X Games on TV. Athletes from all over the world were competing in the most amazing sports. Just then his grandmother walked into the room. "I want to be extreme. Would you really let me do that? You always worry about my safety!" said Jason. "You will have to follow some rules," said his grandmother. "You can only ride in the park -- never on the streets. You have to promise to wear a helmet  . If you hurt yourself too much, I have the right to take your skateboard away. Is it a deal?" "You bet!" Jason was so excited that he jumped off the sofa. A week later he had a board and a helmet. On Saturday, his grandmother dropped him off near the park. He was happy to have a grandmother who let him try new things. Kids in the park were moving quickly up and down the ramps  . They flew into the air and landed as easily as birds. When he watched the X games, Jason felt like he was doing the tricks himself. But watching these kids up close, he knew that none of it was going to be easy. He felt a little bit scared. Very slowly he carried his board to the ramp. Taking a deep breath, he put his right foot on the board. He kicked off with his left foot. For a few seconds he glided   along, just waiting to fall. Then he came to a stop. Kicking off again, he waited for the worst to happen. Again, he stayed up. The third time he kicked, lost his balance, and fell hard on his left knee. It hurt, but it was no big deal! Why had he been so scared? Now he felt calm because things had gone wrong, and he was fine! Next time he kicked off harder and went fast and farther. "Excellent!" said a girl as she passed him. "Extreme!" laughed Jason to himself. "Not quite." Jason's grandmother agreed to let him try skateboarding unless   _  .
A. he finished his homework
B. he liked the sport
C. he observed some rules
D. he won a bet
Answer: