单项选择题

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.