You are the administrator of Red Lington Enterprises. You want to upgrade 125 computers from Windows NT Workstation 4.0 to Windows 2000 Professional. You create an unattend.txt file by using the setup manager.  You copy the file to a floppy disk. You then start the installation on a computer in the test lab using the Windows 2000 Professional CD-ROM.  After the computer starts you insert the floppy disk. Even though you set the user interaction level to full-unattended mode you are prompted for all the configuration parameters. You want to ensure that the unattended installation does not prompt you for input.  What should you do？ （）

• A、Add a [data] section to unattend.txt， and set the unattended install Parameter to YES.
• B、Add an [Unattended] section to unattend.txt， and set the OemPreinstall parameter to Yes.
• C、Rename unattend.txt on the floppy disk to winnt.sif
• D、Create a /$oem$/$1 folder on the hard disk of the test computer， and copy unattend.txt to thefolder.