窗体上添加有3个命令按钮，分别命名为Command1、Command2和Command3，编写Command1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.Enabled＝True
Command3.Visible＝False
End Sub
C．Private Sub Command1_Click()
Command2.Enabled＝True
Command3.Visible＝False
End Sub
D．Private Sub Command1 Click()
Command2.Visible＝True
Command3.Enabled＝False
End Sub