有如下程序:Private Sub Form_Click() Dim Check, Counter Check = True Counter = 0 Do Do While Counter < 20 Counter = Counter + 1 If Counter = 10 Then Check = False Exit Do End If Loop Loop Until Check = FalsePrint Counter, CheckEnd Sub程序运行后,单击窗体,输出结果为______。
A.15 0
B.20 -1
C.10 True
D.10 False