Whenever it would show that USA was in the lead , we would all burst out cheering . On the last 50 m , we were all chanting ' USA ' and getting excited because we were ahead . When we won , it was seriously like an earthquake , everyone was yelling and cheering and screaming .

Question: Why was the stadium shaking all of a sudden ?
Answer: None of the above choices .Fans were cheering for the USA .A minor earthquake hit the area .Fans were cheering for Canada .