A company purchased two Huawei OceanStor 9000 devices, in order to protect the security of data, one set provides storage space for the production site, and the other set provides data redundancy on the disaster site.

A company purchased two Huawei OceanStor 9000 devices, in order to protect the security of data, one set provides storage space for the production site, and the other set provides data redundancy on the disaster site.

Establish a remote replication between two sets of Huawei QceanStor 9000 storage systems, about the related configuration of creating remote replication Pair synchronisation strategy, the incorrect description is:
A . Recovery strategy supports manual and automatic the two modes.
B . Sync rate has high, medium and low, the three grades.
C . Synchronization Type has manual, time wait after the synchronization start, time wait after the synchronization complete, the three kinds of.
D . When the "Synchronization Type" set as "manual", no need to set the timing length. When the "Synchronization Type" set as "time wait after the synchronization start" or "time wait after the synchronization complete", it need to set the timing length.

Answer: B