在窗体上画一个名称为CommonDialogl的通用对话框，一个名为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。该窗体的标题为“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 Command1_C1ick()
CommonDialogl. FileName="SayeFile"
CommonDialogl. Filter="All Files|*. *|(*. txt)|*. txt|(*. doe)|*. doc"
CommonDialogl. FilterIndex=2
CommonDialogl. DialogTitle="Save"
CommonDialogl. Action=2
End Sub
B．Private Sub Command1_Click()
CommonDialogl. FileName="SaveFile"
CqmmonDialogl. Filter="All Files|*. *|*. txt)|*. txt|(*. doe)|*. doff"
CommonDialogl. FilterIndex=1
CommonDialegl. DialogTitle="Save"
CommonDialogl. Action=2
End Sub
C．Private Sub Command1_Click()
CommonDialogl. FileName="Save"
CommonDialogl. Filter="All Files|*. *|(*. txt)|*. txt|(*. doe)|*. doe"
CommonDialogl. FilterIndex=2
CommonDialogl. DialogTitle="SaveFile"
CommonDia]ogl. Action=2
End Sub
D．Private Sub Command1_Click()
CommonDialogl. FileName="SaveFile"
CommenDialogl. Filter="All Files|*. *|(*. txt)|*. txt|(*. doC) |*. doe"