What are three of the functions that AutoQoS performs when it is configured on a switch？（）

• A、synchronizes FIFO， PQ， CQ， and MDRR， with WFQ， CBWFQ， and LLQ
• B、enables strict priority queuing for voice traffic， and weighted round robin queuing for data traffic
• C、enables low latency queuing to ensure that voice traffic receives priority treatment
• D、enforces a trust boundary on switch access ports and uplinks/downlinks 
• E、modifies queue sizes as well as queue weights where required 
• F、adjusts link speeds to adapt to QoS needs