功能失调性子宫出血是指（）。

A.生育期妇女子宫异常出血

B.青春期或围绝经期妇女的异常出血

C.生殖器官无明显器质性病变的异常子宫出血

D.绝经后妇女的异常出血

E.人流术后妇女的异常出血

The driver might have had an accident but that he           the car suddenly .

A．braked

B．would brake

C．had braked

D．should have braked