Which of the following scenarios can achieve bandwidth multiplexing? (Multiple choice)

Which of the following scenarios can achieve bandwidth multiplexing? (Multiple choice)
A . Multiple flows are matched to the same bandwidth policy, and bandwidth multiplexing can be achieved between multiple flows.
B . Multiple bandwidth policies refer to the bandwidth channel in the way of policy sharing, so that bandwidth multiplexing can be achieved among multiple flows that match the bandwidth policy.
C . Bandwidth multiplexing can be achieved between multiple flows that match multiple child policies in the parent-child policy.
D . Multiple bandwidth policies refer to the bandwidth channel in a policy-exclusive manner, and bandwidth multiplexing can be achieved among multiple flows that match the bandwidth policy.

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Answer: ABC