Which of the following in not a good proof to show that Mr.Holland is a good teacher or a good father？

Which of the following in not a good proof to show that Mr.Holland is a good teacher or a good father？
A.He dreams of composing a symphony that can make him rich and famous.
B.A lot of students attend his retirement celebration.
C.He sets a good role model for his son as a good father and a good teacher.
D.His students learn a lot from Mr.HollanD.
正确答案：He dreams of composing a symphony that can make him rich and famous.