Which of the following statements about Flexible ROADM is incorrect?

• A.Improves spectrum utilization and meets the requirements for flexible scheduling in the 100 Gbit/s era.
• B.The WSMD2 board supports the Flexible ROADM configuration.
• C.The Flexible grid technology can flexibly set bandwidth and support flexible bandwidth allocation and scheduling.
• D.Flexible ROADM is compatible with existing networks.

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