All good athletes want to win and all athletes who want to win eat a well-balanced diet; therefore, all athletes who do not e...

Answer: 
Karim, the cricket star, does not eat a well-balanced diet, but be is a good athlete.
All good athletes want to win and all athletes who want to win eat a well-balanced diet; therefore, all athletes who do not eat a well-balanced diet are bad athletes. Which of the following if true, would refute the assumptions of the argument above?