【单选题】

有下列程序，程序运行后单击命令按钮，则输出的结果为()。

Private SubCommand1_Click()
Dim a%(1 To 4), b%(3 To 6), i%, s1#, s2#
For i= 1 To 4
a(i) = i
Next i
For i=3 To 6
b(i)=i
Next i
s1=Factorial (
A．
s2=Factorial (
B．
Print "s1="; s1; "s2="; s2
End Sub