with Father’s Day around the corner, I have taken some money out of the bank—— presents for my dad

A buy    B.to buy  C buying    D to have bought

以下程序的输出结果是( )。
#include ＜iostream.h＞
Void main()

int a[3][3]=1,2),3,4,5,6i,j,s=0;
for(i=1;i＜3；i++)
for(j=0;j＜i;j++) s+=a[i][j];
cout＜＜s＜＜endl;

A) 14
B) 19
C) 20
D) 21