Which of the following descriptions about optical line protection is wrong?

Which of the following descriptions about optical line protection is wrong?
A . Optical line protection is double-ended switching. In the case of a single optical fiber interruption, there will be no inconsistency in sending and receiving routes.
B. Use the OLP board to configure optical line protection. The RI1/T01 optical port of the 0LP board must be working, and the RI2/T02 optical port must be protection.
C. OLP board switching is only related to the received optical power
D. When protecting optical lines, use the dual-feed and selective-receiving function of the OLP single board to protect the line fibers between adjacent sites using separate routes

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Answer: A