When deploying LLQ, you need to configure bandwidth parameters. What is the meaning of bandwidth parameters?

When deploying LLQ, you need to configure bandwidth parameters. What is the meaning of bandwidth parameters?
A . Provide a built-in policer to limit the maximum available bandwidth of low latency queues during congestion
B . This parameter should be as small as possible. It means that the bandwidth is always reserved, even if LLQ is used, this parameter will reduce the available bandwidth of the interface.
C . It indicates that the reference CR is used to calculate the burst size of the built-in policer token bucket.
D . This parameter is an option because LLQ always takes precedence over other queues

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Answer: A