In the 40-wavelength system of wavelength division equipment, due to the aging of the customer’s optical cable, the optical cable between sites 2# and 3# needs to be replaced, and a 4# optical amplifier site needs to be added between 2# and 3#. Which of the following statements are correct?

In the 40-wavelength system of wavelength division equipment, due to the aging of the customer’s optical cable, the optical cable between sites 2# and 3# needs to be replaced, and a 4# optical amplifier site needs to be added between 2# and 3#. Which of the following statements are correct?
A . The optical power of site 2# does not need to be re-adjusted
B . The optical power of site 3# does not need to be re-adjusted
C . It is necessary to consider whether the dispersion budget is sufficient
D . No need to consider whether the dispersion budget is sufficient

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Answer: C