You are the network administrator for Company. to do an unattended installation so you create an Answer.txt file by using Setup Manager. The Answer.txt is copied to a floppy disk and you start the installation on a test computer by booting the computer with the Windows 2000 Professional CD-ROM. You insert the floppy disk after the computer starts. Although you had set the user interaction level to full unattended mode, you are prompted for all the required parameters. You want to ensure that the unattended installation upgrades the Windows 98 computers.  What should you do?（）

• A、Rename Answer.txt on the floppy disk to Winnt.sif.
• B、Boot the computer to Windows 98 and run Winnt32 /unattend：Answer.txt.
• C、Add an [Unattend] section to Answer.txt， and set the OEMPreInstall parameter to Yes.
• D、Create a /$OEM$/$1 folder on the hard disk of the test computer， and copy Answer.txt to the folder.