An architect must address sustained congestion on the access and distribution uplinks of a network. QoS has already been implemented and optimized, but it is no longer effective in ensuring optimal network performance. Which two solutions should the architect use to improve network performance. (Choose two.)

A. Configure selective packet discard to drop noncritical network traffic. B. Bundle additional uplinks into logical EtherChannels. C. Utilize random early detection to manage queues. D. Implement higher-speed uplink interfaces. E. Reconfigure QoS based on the IntServ model.