You need to deploy the Windows 8 Enterprise image to all 25 tablets simultaneously by using the existing WDS infrastructure

You administer client computers that run Windows 8 Enterprise deployed by using Windows Deployment
Services (WDS).
Your company recently purchased 25 new tablets thatrun Windows 8 Pro.
For all 25 new tablets, you want to replace the existing Windows 8 Pro installation with Windows 8 Enterprise.
You need to deploy the Windows 8 Enterprise image to all 25 tablets simultaneously by using the existing WDS
infrastructure.
What should you do?

A.
Start the tablets from the Windows To Go workspace.

B.
Start the tablets from a USB flash drive with a customized Windows Preinstallation Environment (WinPE).

C.
Start the tablets normally. Map the Windows Image(WIM) file from a WDS network share.

D.
Start the tablets from a customized Windows Recovery Environment (WinRE).

Explanation:
Original answer was ‘A’.
Walkthrough: Create a Custom Windows PE Image
Reference:
http://technet.microsoft.com/en-us/library/cc709665(v=ws.10).aspx

To create a bootable UFD
1. During a running Windows Vista operation system or a Windows PE session, insert your UFD device.
2. At a command prompt, use Diskpart to format the device as FAT32 spanning the entire device, setting the
partition to active. For example,
diskpart
select disk 1
clean
create partition primary size=<size of device>
select partition 1
active
format fs=fat32
assign
exit
where the value of disk 1is equal to UFD.
3. On your technician computer, copy all the contentin the \ISO directory to your UFD device. You can
manually create the directory structure or use the xcopycommand to automatically build and copy the
appropriate files from your technician computer to your UFD device. For example,
xcopy c:\winpe_x86\iso\*.* /s /e /f f:\
where c is the letter of your technician computer hard disk and f is the letter of your UFD device.