单项选择题
You have a computer that runs Windows Vista. You install Windows 7 on a new partition on the computer.You need to ensure that the computer always starts Windows Vista by default.
What should you do?()
A.Run Bcdedit.exe and specify the /default parameter.
B.Run Bcdedit.exe and specify the /bootems parameter.
C.Create a boot.ini file in the root of the Windows 7 partition.
D.Create a boot.ini file in the root of the Windows Vista partition.