单项选择题

下列程序中画线处应填入的语句是
class Base

public:
void fun()cout<<"Base of fun"<<end1:

class Derived:public Base
void fun()
_______//显示基类的成员函数fun
cout<<"Derived of fun"<<end1;
;

A.fun();
B.Base.fun();
C.Base∷fun();
D.Base- >fun();