若有以下程序：
#include ＜iostream＞
using namespace std;
class Base
private:
int x;
protected:
int y;
public:
int z;
void setx(int i)
x=i;
int getx ()
return x;
;
class Inherit : private Base
private:
int m;
public:
int p;
void setvalue(int a, int b, intc, int d)
setx (
A．;
y=b;
z=c;
m=d;
void display()
cout＜＜getx () ＜＜","＜＜y＜＜","＜＜z＜＜","＜＜m＜＜end1;
;
int main ( )
Inherit A;
A.setvalue(1,2,3,4);
A.display ();
return 0;
A) 1,2,3,4
B．产生语法错误
C．4,3,2,1
D．2,3,4,5
