7、已知字符串s='? an you ?an a ?an as a ?anner ?an?an a ?an'为被破坏的英文绕口令，想要复原绕口令，就需要将字符串中的'?&

7、已知字符串s='? an you ?an a ?an as a ?anner ?an?an a ?an'为被破坏的英文绕口令，想要复原绕口令，就需要将字符串中的'?'替换为字母'c'，能实现这个功能的代码是( )

A、s = split('?')

B、s = split('?','c')

C、s = s.replace('c','?')

D、s = s.replace('?','c')