在窗体上画一个名称为CommonDialogl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，默认文件名为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 Click()
CommonDialogl.FileName＝"SaveFile"
CommonDialogl.Filte＝"All Files|*.*|(*.txt)|*.txt|(*.doc) |*.doc"
CommonDialogl.FilterIndex＝2
CommonDialogl.DialogTitle＝"Save"
CommonDialogl.Action＝2
End Sub
B．Private Sub Commandl_Click()
CommonDialogl. FileName="SaveFile"
CommonDialogl. Filter= "All Files| *. * | (*. txt)[*. txt| *. doc| *. doc"
CommonDialogl. FilterIndex= 1
ComonDialogl. DialogTitle = "Save"
CommonDialogl. Action= 2
End Sub
C．Private Sub Cmmandl_Click()
CommonDialogl. FileName= "Save"
CommonDialogl. FiLter="All Files | *. * |(*. txt)|*. txt|(*. doc) |*. doc"
CommonDialogl. FilterIndex= 2
CommonDialogl. DialogTitle = "SaveFile"
CommonDialogl. Action= 2
End Sub
D．Private Sub Commandl_Click()
CommonDialogl. FileName = "SaveFile"
CommonDialogl. Filter= "All Files|*. *|(*. txt)|*. txt| (*. doc) |*. doc"
CommonDialogl. FilterIndex=1
CommonDialogl. DialogTitle= "Save"
CommonDialogl. Action=1
End Sub