[单项选择题] 程序如下：Private Sub form_ Activate() Dim a As Integer for i=4 To 5a=fun(i)Print a, Next iEnd

[单项选择题] 程序如下：Private Sub form_ Activate() Dim a As Integer for i=4 To 5a=fun(i)Print a, Next iEnd SubPrivate Function fun(n)As Integer if n ＞0 thenfun =n* fun(n-1) Elsefun=1 End ifEnd Function 程序最后打印结果是______。

A．4 5

B．12 120

C．24 120

D．24 60