(单选题)17: 在窗体上面一个命令按钮（其Name属性为Commandl），然后编写如下代码：Option Base 1Private Sub Commandl_Click( )Dim a(4,4)For i =1 To 4For j =1 To 4a(i,j) = (i-1)*3+jNext jNext iFor i =3 To 4For j =3 To 4Print a(j,i);Next jPrintNext iEnd Sub程序运行后，单击命令按钮，其输出结果为
A: 6 9 7 10
B: 7 10 8 11
C: 8 11 9 12
D: 9 12 10 13
