单项选择题

下列程序中画线处应填入的语句是  classBase  {    public:      voidfun( ){COUt<<"Baseoffun"<<endl;}  };      classDerived:publicBase  {    voidfun( )      {      _______//显示基类的成员函数fun       cout<<"Derivedoffun"<<endl;      }  };

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