Which of the following three statements are correct regarding IPv6 QoS? (Choose three.)

Which of the following three statements are correct regarding IPv6 QoS? (Choose three.)
A . The traffic class field in the IPv6 header can be used to set specific precedence or DSCP values.
B . A 20-bit flow label field enables per-flow processing.
C . DS-TE is not supported by IPv6.
D . Per-hop behavior in IPv6 networks is based on EXP bits.
E . IPv6 QoS features are configured using the modular QoS CLI on Cisco routers.

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Answer: A,B,E