单项选择题

单击命令按钮时,下列程序的执行结果是 Private Sub Command1_Click() BT4 End Sub Private Sub BT(x As Integer) x=x * 2 + 1 If x<6 Then Call BT(x) End If x=X * 2 Print x; End Sub

A.15
B.16
C.17
D.18