单项选择题

下面程序运行后，单击命令按钮，输出的结果是( )。
Private Sub Command1_Click()
Dim a%(1 To 4),b%(2 To 6),i%,str1#, str2#
For i=1 To 4
a(i)=1
Next
For i=2 To 6
b(i)=i
Next
str1=YAG(A)
str2=YAG(B)
Print "str1="; str1; "str2=": str2
End Sub
Function YAG(a() As Integer)
Dim t#，i%
t=1
For i=LBound(A) To UBound(A)
t=t*a(i)
Next
YAG=t
End Function

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