What does the auto qos voip cisco-phone command do? Select the best response.

A.
If a Cisco IP phone is attached, the switch trusts the CoS.

B.
The switch assigns a CoS value of 5 to incoming packets.

C.
It turns on STP to see if a Cisco IP phone is attached.

D.
If a Cisco IP phone is attached and removed, the switch continues to trust the CoS values as long as the switch is not rebooted.

E.
It disables the trust boundary feature because the switch knows a Cisco IP phone is attached.