Your computer runs Microsoft Windows Vista Home Basic edition.  When you attempt to upgrade your computer to Microsoft Windows Vista Ultimate edition by booting from the DVD-ROM， you receive the following warning message： "The partition you selected might contain files from a previous Microsoft Windows installation. If it does， these files and folders will be moved to a folder named Microsoft Windows.old. You will be able to access the information in Microsoft Windows.old， but you will not be able to use your previous version of Microsoft Windows." You need to complete the upgrade.  What should you do？ （）

• A、Boot into safe mode. Launch the setup.exe application from the Windows Vista Ultimate edition DVD-ROM.
• B、Boot from the Windows Vista Ultimate edition DVD-ROM and click the command prompt option. Use the diskpart utility to create a new primary partition for the Windows Vista Ultimate edition installation.
• C、Log on to the Windows Vista Home Basic edition installation. Launch the setup.exe application from the Windows Vista Ultimate edition DVD-ROM， and then click the Custom （Advanced） option.
• D、Log on to the Windows Vista Home Basic edition installation. Launch the setup.exe application from the Windows Vista Ultimate edition DVD-ROM， and then click the Upgrade option.