单项选择题

在窗体上画一个按钮，然后编写如下事件代码。单击按钮，输出为 ______。
Private Function fun3(x As Integer)
Static t As Integer
t = t + 3
t = t + x
fun3 = t
End Function
Private Sub Commandl Click()
Dim a As Integer, b As Integer, c As Integer
a = 2 : b = 1
c = fun3 (a)
c = fun3 (b)
Print c
End Sub

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