大脑是人的思想器官，这个器官和其他人体器官一样，是愈用愈发达，不用则______。

A．退化

B．消褪

C．蜕化

D．消蜕

Although her initial success was （） by the fact that she was the daughter of a famous actor, the critics later acclaimed her as a star in her own right.

A．enhanced

B．impeded

C．refuted

D．superseded