When configuring AutoQoS on a Catalyst 2950 or Catalyst 3550 switch, which two actions does the command auto qos voip cisco-phone perform? (Choose two)

A.
Uses the Cisco Discovery Protocol (CDP) to detect the presence or absence of a Cisco IP phone.

B.
Enables the trusted boundary feature if a Cisco IP phone is detected.

C.
Initiates a DHCP request to obtain an IP address for any attached IP phone.

D.
Initiates a TFTP download to download configuration to any attached IP phone.

E.
Sets all voice traffic frames with a COS of 5 and nonvoice traffic frames to a COS 0.

Explanation:
Note: The equipment will verify if there are a cisco-phone connected by CDP and if it is connect will trust on all qos values. The cisco-phone will mark itself packets to dscp EF and the PC packets to dscp 0.