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
t=Tof(b))
Print“t=”:t,
End Sub
Function Tof(a() As Integer)
Dim t%,i%
t=1
For i=2 To UBound(a)
t=t a(i)
Next
Tof=t
End Function

A) t=18
B) t=24
C) t=30
D) t=32