For 10G and coherent 100G mixed transmission systems, which of the following description is correct?

For 10G and coherent 100G mixed transmission systems, which of the following description is correct?
A . It is recommended to use long wavelengths for 10G channels and short wavelengths for 100G channels
B. Commissioning needs to be carried out according to the commissioning requirements of 100G, that is, non-standard in-fiber optical power commissioning method
C. For 100G single wave, due to the large dispersion tolerance, the dispersion compensation can be compensated according to the compensation principle of 10G
D. The OSNR threshold of the 100G single board is basically the same as that of 10G, so the configuration of the amplifier board can be configured according to the 10G standard

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Answer: C