What happens to voice packets from a Cisco 8845 IP phone in the QoS trust boundary?

What happens to voice packets from a Cisco 8845 IP phone in the QoS trust boundary?
A . The voice packets are not trusted, and the access layer switch reclassifies the packets.
B . The voice packets are classified by the phone, and the classification is accepted.
C . The phone and access layer switch negotiate the classification of packets.
D . Cisco UCM determines how the voice packets are classified.

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Answer: B