Your network contains a single Active Directory site.

You plan to deploy 1,000 new computers that will run Windows 7 Enterprise. The new computers have Preboot Execution Environment (PXE) network adapters.
You need to plan the deployment of the new computers to meet the following requirements:
Support 50 simultaneous installations of Windows 7
Minimize the impact of network operations during the deployment of the new computers
Minimize the amount of time required to install Windows 7 on the new computers

What should you include in your plan?

A.
Deploy the Windows Deployment Services (WDS) server role. Configure the IP Helper tables on all routers.

B.
Deploy the Windows Deployment Services (WDS) server role. Configure each WDS server by using native mode.

C.
Deploy the Windows Deployment Services (WDS) server role and the Transport Server feature.
Configure the Transport Server to use a custom network profile.

D.
Deploy the Windows Deployment Services (WDS) server role and the Transport Server feature.
Configure the Transport Server to use a static multicast address range.

Explanation:
http://technet.microsoft.com/en-us/library/cc726564%28WS.10%29.aspx
http://technet.microsoft.com/en-us/library/cc725964%28WS.10%29.aspx