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.Base.fun( );
C.Base::fun( );
D.Base->fun( );