单项选择题

有程序如下:
Sub subP(b() As Integer)
For i=1 To 4
b(i)=2*i
Next i
End Sub
Private Sub Command1_Click()
Dim a(1 To 4) As Integer
a(1)=5
a(2)=6
a(3)=7
a(4)=8
subP a()
For i=1 To 4
Print a(i)
Next i
End Sub
运行上面程序，单击命令按钮，输出结果为______ 。

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