单项选择题

单击命令按钮时,下列程序的运行结果为
Private Sub Command1_Click( )
 Print MyBM(23,18)
End Sub
Public Function MyBM(m As Integer,n As Integer)As Integer
 Do While m< >n
  Do While m > n:m=m - n:Loop
  Do While m < n:n=n - m:Loop
 Loop
 MyBM=m
End Function

A.0
B.1
C.3
D.5
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