下列程序中划线处正确的语句是( )。#include ＜iostream＞using namespace std;class Basepublic:void fun() cout＜＜ Base:: fun ＜＜end1; ;class Derived: public Base void fun() _______________________ 显试调用基类的函数 fun() cout ＜＜ Derived:: fun ＜＜end1;;
A．fun();
B．Base. fun();
C．Base:: fun();
D．Base-＞fun();