单项选择题

有如下函数过程:
Function Fun(By Val x As Ingeger,ByVal y As Integer)As Integer
  Do While…Y<>0
    reminder=x Mod Y
    x=y
    y=reminder
  Loop
  Fun=X
End Function
以下是调用该函数的事件过程,该程序的运行结果是
Private Sub Command1_Click()
Dim a As Integer
Dim b As Integer
  a=100:b=25
  x=Fun(a,b)
  Print x
End Sub

A.0
B.25
C.50
D.100