You have an answer file for a Windows 7 installation. You need to perform an unattended installation of Windows 7 by using the answer file. You must achieve this goal by using the minimum amount of administrative effort. What should you do?

A.
Name the answer file autounattend.xml and save it to a USB disk. Start the computer from the Windows 7 DVD.

B.
Name the answer file autounattend.ini and save it to a USB disk. Start the computer from the Windows 7 DVD.

C.
Name the answer file unattend.xml and save it to a USB disk. Start the computer from the Windows Preinstallation Environment (Windows PE).

D.
Name the answer file unattend.txt and save it to a USB disk. Start the computer from the Windows Preinstallation Environment (Windows PE).

Explanation:
Unattended installation
You can perform an unattended installation of Windows 7 by using an installation file called Unattend.xml. These installation files store answers to the questions asked by the Setup Wizard. When the Windows 7 installation process starts, Windows checks for attached USB storage devices that have this file in their root directory. Unattended installations are suitable when you need to deploy Windows 7 to a large number of computers because you do not have to interact with them manually, responding to prompts, as the installation progresses.
Building a Reference Installation
You configure your reference computer with a customized installation of Windows 7 that you then duplicate onto one or more destination computers. You can create a reference installation by using the Windows product DVD and (optionally) the answer file you created in the previous section.
To install your reference computer using an answer file, perform the following procedure:
1. Turn on the reference computer. Insert the Windows 7 product DVD and the UFD containing the answer file (Autounattend.xml) that you created in the previous section. Note that the use of an answer file is optional, although it is the method Microsoft recommends. If you prefer, you can install Windows 7 manually from the installation DVD-ROM.
2. Restart the computer by pressing CTRL+ALT+DEL. You may have to override the boot order to boot from the CD/DVD-ROM disk. If so, select the appropriate function key to override the boot order during initial boot. Windows Setup (Setup.exe) starts automatically and searches the root directory of all removable media for an answer file called Autounattend.xml.
3. After Setup finishes, you can validate that all customizations were applied. For example, if you included the optional Microsoft-Windows-IE-InternetExplorer feature and set the Home_Page setting in your answer file, you can verify these settings by opening Internet Explorer.
4. To prepare the reference computer for the user, you use the Sysprep utility with the /generalize option to remove hardware-specific information from the Windows installation and the /oobe option to configure the computer to boot to Windows Welcome upon the next restart.