单项选择题

下列程序运行后的输出结果是 Private Sub Command1_Click() For k=3 To 1 Step-1 x=String(k,"*") Print x Next End Sub

A.* * * * * *
B.1 * 2 * 3 *
C.3 * 2 * * 1 * * *
D.* * * * * *