When inserting LCK to the ODUk signal at the local end, what processing will the downstream station system not perform?

When inserting LCK to the ODUk signal at the local end, what processing will the downstream station system not perform?
A . Report ODUk_PM_LCK alarm
B. Download ODUk_AIS information
C. Return ODUk_PM_BDI
D. Insert ODUk_PM_LCK alarm

Answer: D.

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