Which of the following descriptions about branch SNCP protection is wrong?

Which of the following descriptions about branch SNCP protection is wrong?
A . When configuring a branch SNCP, you need to set the SNCP subtype.
B . The crossover granularity is GE or Any signal
C . Trigger conditions are: board not in place, SF, SD
D . Branch SNCP protection uses the dual-transmit and selective-receive function of electrical layer crossover to protect the customer-side services accessed by the branch board.

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Answer: B