You need to ensure that the computer always starts Windows Vista by default

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.
Create a boot.ini file in the root of the Windows 7 partition.

B.
Create a boot.ini file in the root of the Windows Vista partition.

C.
Run Bcdedit.exe and specify the /default parameter.

D.
Run Bcdedit.exe and specify the /bootems parameter.

Explanation:
The Bcdedit.exe utility allows you to manage boot configuration.

/default – Sets the default entry that the boot manager willl use.
/bootems – Enable or disables Emergency Management Services for a boot application.

NOT boot.ini:
Windows (specifically Ntldr) uses the Boot.ini file to determine which operating system options to display when the Startup program is running.