You are a help desk technician for your company, which is in the process of deploying Windows XP Professional to all client computers. You upgrade Pierre’s Windows 98 portable computer to Windows XP Professional. After the upgrade, Pierre reports that some of his older software applications no longer work properly. Also, one of the hardware devices on his computer is not currently supported by Windows XP Professional. Pierre requests that you reinstall Windows 98 and all of his applications so that he can use his computer normally. You need to restore Pierre’s computer to its pre-upgraded state while retaining all of the applications,documents, and personal data on the computer. You want to accomplish this task in the minimum amount of time. What should you do?（） 

• A、Copy Pierre’s documents and personal data to a shared folder on the network.
• B、Reinstall Windows 98 and Pierre’s applications. 
• C、Copy the documents and personal data to the My Documents folder on Pierre’s computer.
• D、On Pierre’s computer, run Setup.exe from a Windows 98 installation CD. 
• E、On Pierre’s computer, use the Add or Remove Programs Wizard to remove the Windows XP Professional Installation item. 
• F、On Pierre’s computer, use a third-party disk-imaging software utility to apply a disk image that contains Windows 98 and Pierre’s applications.