C. "My knees are killing me," he complained after the run.
A hyperbole is an over exaggeration. The correct answer is "My knees are killing me" because the runners knees aren't actually killing him. They are just painful. The other examples are not hyperbole because nothing is being exaggerated. The friend is being generous. Depending on perspective losing by 50 points may not be so bad. Also, it could be chilly out.