单项选择题

下面程序输出的结果是( )
#include<iostreas.h>
void main()
inti:
int a[3] [3]=1,2,3,4,5,6,7,8,9;
for(i=0;i<3;i++=
cout<<a [i] [i]<<" ";

A.1 59
B.7 5 3
C.3 5 7
D.5 9 1