Refer to the exhibit:
Which command is used to complete this configuration for QoS class-based marking?
A . PE-A(config-pmap-c)#set dscp ef
B . PE-A(config-pmap-c)#fair-queue
C . PE-A(config-pmap-c)#random-detect
D . PE-A(config -pmap-c)#priority
Answer: A
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