The audience was _____ very young children so there was a lot of noise while the concert was going on. [ ]

A. made up from

B. made up for

C. made up into

D. made up of

请将下列类定义补充完整
class Basepublic: void fun()cout＜＜"Base::fun"＜＜end1;;
class Derived:public Base

public:
void fun()
______//显式调用基类的fun函数
cout＜＜"Derived::fun"＜＜end1;

;