Refer to the exhibit.

Which Catalyst switch interface command would be used to cause the
switch to instruct the phone to override the incoming CoS from the PC before forwarding the
packet to the switch?

A.
mls qos cos 2 override

B.
switchport priority extend cos 11

C.
switchport priority extend trust

D.
switchport priority extend none

E.
mls qos cos 2

F.
switchport priority extend cos 2

Explanation:
Overriding the CoS Priority of Incoming Data Frames
You can connect a PC or other data device to a Cisco 7960 IP Phone port. The PC can
generate packets with an assigned CoS value. You can configure the switch to override the
priority of frames arriving on the IP phone port from connected devices.
Beginning in privileged EXEC mode, follow these steps to override the CoS priority received
from the nonvoice port on the Cisco 7960 IP Phone:

Reference:
http://www.cisco.com/en/US/docs/switches/lan/catalyst2950/software/release/12.1_14_ea1/c
onfiguration/guide/swvoip.html