在窗体上画一个名称为CommonDialog1的通用对话框，一个名称为Command1的命令按钮。要求单击命令按钮时，打开一个保存文件的通用对话框。该窗口的标题为“Save”，缺省文件名为“SaveFile”；在“文件类型”栏中显示*.txt。则能够满足上述要求的程序是( )

A．Private Sub Command_Cilck()
CommonDialOR1.P11eName="SaveFile"
CommonDialOg1.Filter="AllFiles|*.*|(*.txt)|(*.doc)|*.doc"
CommonDialOg1.P11terlndex=2
CommonDialOg1.DialogTitle="Save"
CommonDialOg1.Action=2
End Sub

B．Private Sub Commandl_Click()
CommonDial021.FileName："SaveFile"
CommonDialog1.Pnter二”AllFlleS卜刮(*．txt)陡txtHdOc卜doc”
CommonDialog1.FilterIndex=1
CommonDialog1.DialogTitle="Save"
CommonDialog1.Action=2
End Sub

C．Private Sub Commandl_Cilck()
CommonDialog1.FileName="Save"
CommonDialog1.Filter="AllFileS|*.*|(*.txt)|*.txt|(*.doc)|*.doc"
CommonDialog1.Filterlndex=2
C0mmonDialoZ1.DialogTitle="SaveFlle"
CommonDialog1.Action=2
End Sub

D．Private Sub Commandl_Click()
CommonOialoR1.FlleName="SaveFile"
CommonDialog1.Filter="AllFiles|*.*|(*.txt)|*.txt|(*.doc)|*.doc"
CommonDialog1.Filterlndex=1
CommonDialog1.DialogTitle="Save"
CommonDialog1.Action=1
End Sub