You have a customized image of Windows 7 Professional.

You need to create a new unattended file to automate the deployment of the image.

You must achieve this goal by using the minimum amount of administrative effort.

What should you do first?

A.
Run Imagex.exe and specify the /mount parameter.

B.
Run Dism.exe and specify the /mount-WIM parameter.

C.
From Microsoft Deployment Toolkit (MDT), add the custom Windows image (WIM).

D.
From Windows System Image Manager (Windows SIM), open the custom Windows image (WIM).

Explanation:
Windows SIM
Opens Windows images, creates answer files, and manages distribution shares and configuration sets.

NOT Dism
Deployment Image Servicing and Management (DISM) is a command-line tool used to service Windows images offline before deployment. You can use it to install, uninstall, configure, and update Windows features, packages, drivers, and international settings. Subsets of the DISM servicing commands are also available for servicing a running operating system.

NOT Imagex
ImageX is a command-line tool that enables original equipment manufacturers (OEMs) and corporations to capture, to modify, and to apply file-based disk images for rapid deployment. ImageX works with Windows image (.wim) files for copying to a network, or it can work with other technologies that use .wim images, such as Windows Setup, Windows Deployment Services (Windows DS), and the System Management Server (SMS) Operating System Feature Deployment Pack.

/mount
Mounts a .wim file from Windows XP with Service Pack 2 (SP2), Windows Server 2003 with Service Pack 1 (SP1), or Windows Vista with read-only permission to a specified directory. Once the file is mounted, you may view, but not modify, all the information contained in the directory.

NOT MDT
MDT 2010 is the Microsoft solution accelerator for operating system and application deployment
and offers flexible driver management, optimized transaction processing, and access to distribution shares from any location. You can use the MDT on imaging and deployment servers to implement the automatic deployment of Windows 7 (for example) on client computers. It is possible to run MDT 2010 on a client running Windows 7, but in practice it would typically run from a distribution server running Windows Server 2008.

The MDT provides detailed guidance and job aids and offers a common deployment console that contains unified tools and processes that you can use for client and server deployment. The toolkit offers standardized desktop and server images, along with improved security and ongoing configuration management.