Your network contains a Lync Server 2010 Standard Edition server and 200 client computers.
All client computers have Microsoft Lync 2010 installed.
Users report that they are unable to use application sharing.
You need to ensure that all the users can share applications.
What should you do?

A.
Modify the Global Conferencing Policy.

B.
Create an Edge pool that contains one server.

C.
Modify the Global Meeting Configuration settings.

D.
Install the Microsoft Office Live Meeting 2007 client on all the client computers.

Explanation:
http://technet.microsoft.com/en-us/library/gg429706.aspx