Which of the following options is correct about congestion management?

Which of the following options is correct about congestion management?
A . When using the DWRR method, the weight ratio of each queue can be adjusted, but the total size is a fixed value.
B . When using the PQ mode, if the packet carrying priority is higher, the time it is sent from the port will be earlier.
C . If the low-priority queue uses PQ and the high-priority queue uses DWRR, the packets in the low-priority queue will be sent first.
D . When using DWRR, the larger the packet size, the larger the actual egress bandwidth obtained.

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Answer: B