Which solution should the engineer use to of mark traffic traveling between branch sites?

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The customer solution requires QoS to support streaming multimedia over a WAN. An architect chooses to use Per-Hop Behavior .

Which solution should the engineer use to of mark traffic traveling between branch sites?
A . LLQ with DSCP EF
B . CBWFQ with DSCP AF3
C . CBWFQ with DSCP AF2
D . LLQ with DSCP AF4

Answer: A