You have a computer that is certified for Windows 7.

You need to install Windows 7 on the computer.

The installation method must prevent you from being prompted for information during the installation.

What should you do?

A.
Create an unattend.txt file on a removable drive. Start the computer from the Windows 7 installation media.

B.
Create an autounattend.xml file on a removable drive. Start the computer from the Windows 7 installation media.

C.
Start the computer from the Windows 7 installation media. At the command prompt, run Setup.exe and specify the /m parameter.

D.
Start the computer from the Windows 7 installation media. At the command prompt, run Setup.exe and specify the /tempdrive.

Explanation:
Copy the Autounattend.xml file to the root directory of a removable storage device (such as a UFD).
You now have a basic answer file that automates Windows Setup.
Turn on the reference computer.
Insert the Windows 7 product DVD and the UFD containing the answer file (Autounattend.xml) that you created.
Windows Setup (Setup.exe) starts automatically and searches the root directory of all removable media for an answer file called Autounattend.xml

Note: that the use of an answer file is optional, although it is the method Microsoft recommends. (And it was specified in the question).