You need to recommend changes to improve the quality of Lync calls for users in the Detroit and Chicago offices. Which change should you recommend?
A. Upgrade the data center’s Multiprotocol Label Switching (MPLS) link to 1,100 megabits per second (Mbps).
B. Implement Quality of Service (QoS).
C. Upgrade the wide area network (WAN) links at these offices to 30 megabits per second (Mbps).
D. Connect the offices to the Multiprotocol Label Switching (MPLS) network from Provider-1.
