Which of the following statements is not true？

Which of the following statements is not true？
A.Music can affect us physiologically， physically and emotionally.
B.Stimulating music can make us feel relaxed and less stresseD.C.Organizers of basketball games use music to excite the crowd and encourage the team.
D.It is uncertain that listening to Mozart makes us smarter.
正确答案：Stimulating music can make us feel relaxed and less stressed.