You are a helpdesk technician at Company's main office. You have been assigned the task to upgrade all 350 client computers from Windows 98 to Windows 2000 professional. All client computers in your office are configured with identical hardware. However, several different peripheral devices are used throughout the company. Users are not allowed to manage their workstations. Many of the users have installed software, changed video settings and compressed their hard drives using DriveSpace on their Windows 98 computer. You create a Setup.txt file by using Setup Manager. You run Winn32 /Unattend:Setup.txt on one of the Windows 98 computers. The installation fails with an error message. You want to upgrade the Windows 98 computer to Windows 2000 Professional. What should you do? （）

A. Rename Setup.txt to unattend.txt. Run Winnt32 /Unattend：Unattend.txt.
B. Connect the Windows 98 computer to the Internet. Rerun Winnt32 /Unattend：Setup.txt
C. Uncompress the hard disk on the Windows 98 computers to disable DriveSpace. Rerun Winnt32 /Unattend：Setup.txt.
D. Create a bootable floppy disk that contains and automatically runs Winnt32 /CheckUpgradeOnly. Boot the Windows 98 computer with the floppy disk.