Your network has Microsoft Office Communications Server 2007 R2 installed. You migrate the Office Communications Server 2007 R2 infrastructure to Lync Server 2010. The network contains 2,000 users who use Microsoft Lync 2010 and 100 users who use Microsoft Office Communicator 2007 R2. The corporate security policy states that when users sign in, they must restrict their presence information so that it is visible to only their contacts. You need to recommend changes to the Lync Server 2010 infrastructure to meet the corporate security policy requirements. What should you include in the recommendation?
A. a Monitoring Server and a Client Version Policy
B. Privacy Mode and a Client Version Policy
C. a Monitoring Server and a Client Version Configuration
D. Privacy Mode and a Response Group