An Aruba CX switch administrator needs to prioritize voice traffic end-to-end. At the ingress access port, which action should be taken to trust the phone's DSCP markings?
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A
Apply 'qos trust dscp' on the access port
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B
Apply 'qos trust cos' on the uplink port only
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C
Use a policy map to remark all traffic to DSCP 0
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D
Enable LLDP-MED to automatically trust all QoS markings