窗体中有3个命令按钮，分别命名为Command1、Command2和Command3。当单击Command1按钮时，Command2按钮变为可用，Command3按钮变为不可见。下列Command1的单击事件过程中，正确的是

A．Private sub Command 1_Click()
Command2.Visible=True
Command3.Visible=False
End Sub
B．Private sub Command1_Click()
Command2.Enable=True
Command3.Enable=False
End Sub
C．Private sub Command1_Click()
Command2.Enable=True
Command3.Visible=False
End Sub
D．Private sub Command1_Click()
Command2.Visible=True
Command3.Enable=False
End Sub