窗体上有3个按钮Commandl、Command2和Command3,如以下代码: Private Sub Commandl Click() Command2.Enabled:Fal3e Command3.Vi3ible=Fal3e End Sub 该程序的功能是 ( )
A.当单击按钮Command1时, Command2和Command3按钮不可用 B.当单击按钮Command1时, Command2和Command3按钮不可见 C.当单击按钮Command1时, Cammand2按钮不可用和Command3按钮不可见 D.当单击按钮Command1时, Command2按钮不可见和Command3按钮不可用