A systems administrator is troubleshooting issues with network slowness. Traffic analysis shows that uplink bandwidth on the core switch is often sustained at 125Mbps due to a combination of production traffic from other sources. Which of the following would BEST resolve the issue?

A. Turn off the servers that use the most bandwidth.
B. Enable QoS to prioritize production traffic.
C. Increase the buffer size on the core switch.
D. Reboot the core switch.