单项选择题

在窗体上画一个名称为Commandl的命令按钮,然后编写如下程序:
Private Sub Command1_Click()
Dim i As Integer,j As Integer
Dim a(10, 10)As Integer
For i=1 To 3
For i=1 To 3
a(i,j)=(i-1) *3+j
Print a(i,j);
Next i
Print
Next i
End Sub
程序运行后,单击命令按钮,窗体上显示的是

A.1 2 3
246
3 69
B.2 3 4
3 4 5
4 5 6
C.1 4 7
2 5 8
3 6 9
D.1 2 3
4 5 6
7 8 9