Which of the following statements about reuse is correct?

Which of the following statements about reuse is correct?

In the process of byte interleaved multiplexing, the information payload and pointer bytes of each frame are interleaved and multiplexed according to the original value, and the segment overhead is also multiplexed accordingly.
A . There will be 4 times the overhead in STM-1 in STM-4
B. The overhead in STM-4 is newly integrated and has only one set of overhead
C. The amount of overhead in STM-4 is the same as in STM-1
D. Overhead random generation in STM-4

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Answer: B