You plan to deploy Lync Server 2010 Standard Edition on the network.
You need to modify the Active Directory schema for the planned deployment.
What should you do?

A.
From the Lync Server Management Shell, run the Install-CsAdServerSchema cmdlet.

B.
From the Lync Server 2010 installation media, run setup.exe -prepareschema.

C.
Run the Lync Server 2010 – Deployment Wizard, and then click Prepare first Standard Edition server.

D.
Run the Lync Server 2010 – Deployment Wizard, and then click Install or Update Lync Server System.

Explanation:
http://technet.microsoft.com/en-us/library/gg412729.aspx