小林学习还是比较认真的，但他有个毛病，遇到困难就怀疑自己的能力。请你从下面选一句最适合的话，送给他[ ]

A．不满是向上的车轮                             

B．千里之行，始于足下

C．点燃自信之灯，你定会发现自己有惊人之处       

D．少壮不努力，老大徒伤悲

一 Yao Ming had to give up the rest of the season because of his broken leg.

一 _____[ ]

A. He was so careless.

B. Never mind.

C. That's all right.

D. What a pity!