Which three statements about voice VLANs are true?

Which three statements about voice VLANs are true? (Choose tliree )
A. Incoming OoS values are trusted only for untagged traffic
B. When voice VLAMs are enabled. RortFast is configured automatically
C. When voice VLAMS are configured, all untagged traffic is set to CoS 5
D. IP Phones ovverride the CoS on all incoming tagged and untsgged traffic
E. Their default CoS value is 0
F. They are disabled by default

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