窗体上添加有3个命令按钮，分别命名为Command1、Command2和Command3。编写Commandl的单击事件过程，完成的功能为：当单击按钮Command1时，按钮Command2可用，按钮Command3不可见。以下正确的是( )。

A．Private Sub Command1_C1ick()
Command2.Visible=True
Command3.Visible=False
End Sub

B．Private Sub Commandl_C1ick()
Command2.Enabled=True
Command3.Enabled=False
End Sub

C．Private Sub Conunand1_C1ick()
Command2.Enabled=True
Command3.Visible=False
End Sub

D．Private Sub Command1_Click()
Command2.Visible=True
Command3.Enabled=False
End Sub

泥石流