The following are the statements about LDP reliability, which one is wrong?

The following are the statements about LDP reliability, which one is wrong?
A . LDP FRR can also be used to generate an LSP for the label mapping from the non-optimal next hop. And it can be as a backup of the primary LSP to establish the transfer entries.
B . The association between the LDP and the IGP requires the IGP to suppress the advertisement of the route and ensure that the LDP path is consistent with the IGP path.
C . The manually configured LDP FRR policy defaults to a 32-bit backup route that triggers LDP to establish a backup LS
E . LDP GR Graceful Restart uses the feature that the MPLS forwarding plane is separated from the control plane. The device does not interrupt when the protocol is restarted or the active/standby switchover is performed.

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Answer: C