You perform a clean installation of Microsoft Windows Vista on the first partition. Then， you install Microsoft Windows XP Professional on the second partition of the same machine. You are able to log on to Windows XP Professional but do not have the option to boot to Windows Vista. You need to be able to dual boot the computer. What should you do？（）

A. Run the bootcfg.exe application with the /fastdetect option.
B. Perform a clean installation of Windows Vista on the first partition.
C. Run the msconfig.exe application and change the order of the operating systems in the boot.ini file.
D. Edit the boot.ini file. Add the following line： Multi（0）Disk（0）Rdisk（0）Partition（1）\Microsoft Window