The sentence that has a dangling modifier is: "Jumping for joy, the basketball championship was won".
Explanation: A dangling modifier happens when the subject being modified, isn't evident in the sentence and that leads to confusing the reader because most of the time that sentences is not going to make sense.
In the sentence: "Jumping for joy, the basketball championship was won". we can see that the subject described as the winner, is not there which leads the reader to feel confused about which of the team won the championship.