单项选择题

有如下程序:
#include <iostream>
using namespace std:
class Testpublic:
Test() n+=2;
~Test() n-=3; ;
static int getNum() return n;
privaue:
static int n:
;
int Test::n=1;
int main() Test* p=new Test;
delete p;
cout<<"n="<<Test::getNum()<<end1;
return 0; 执行后的输出结果是

A.n=0
B.n=1
C.n=2
D.n=3