问题：

[多选] 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 need