单项选择题

下面程序段,运行后的结果是
Private Sub Command1_Click()
Dim b%(1 To 4),i%,t#
For i=1 TO 4
b(i)=i
Next i
t=Tof(b())
Print"t=";t,
End Sub
Function Tof(a()As Integer)
Dim t#,i%
t=1
For i=2 To UBound(

A.