单项选择题

下面程序输出的结果为
#include"iostream.h"
class A

public:
A( )cout<<"CLASS A"<<endl;
~A( )

class B:public A

public:
B( )cout<<"CLASS B"<<endl;
~B( )

void main( )

A*p;
p=new B;
B *q;
q=new B;

A)CLASS A
   CLASS B
B)CLASS A
   CLASS B
   CLASS B
C) CLASS A
CLASS B
CLASS A
CLASS B
D) CLASS A
CLASS B
CLASS B
CLASS B