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Which two statements about the QoS-group keyword on Cisco IOS XR 3re true?

Refer to the exhibit:

A network engineer is implementing QoS services.

Which two statements about the QoS-group keyword on Cisco IOS XR 3re true? (Choose two )
A . The QoS group numbering corresponds to priority level
B . QoS group marking occurs on the ingress
C . It marks packets for end to end QoS pokey enforcement across the network
D . QoS group can be used in fabric QoS policy as a match criteria
E . It cannot be used with priority traffic class

Answer: BD

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