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