单项选择题

在窗体上画一个命令按钮(其Name属性为Command1),然后编写如下代码: Private Sub Command1_Click() Dim a(5,5)   For i=1 To 3     For j=1 To 4       a(i,j)=i*j     Next   Next   For n=1 To 2     For m=1 To 3       Print a(m,n);     Next   Next End Sub 程序运行后,单击命令按钮,输出结果是

A.2 4 6 1 2 3
B.1 2 3 2 4 6
C.1 2 3 4 5 6
D.6 5 4 3 2 1