The following description of Flexible ROADM, which is wrong?

The following description of Flexible ROADM, which is wrong?
A . Improve spectrum utilization to meet the flexible scheduling requirements of the future era of over 100Gbit/= rate.
B . DFlexible ROADM is compatible with existing networks
C . WSMD2 board supports F1exible ROADM configuration
D . Flexible grid technology can flexibly set the bandwidth and support the flexible allocation and scheduling of bandwidth.

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Answer: C