After major operations are performed on FusionAccess, the system may be abnormal. At this time, it needs to be rolled back and restored. turn off Yu retreats and resumes Is the law correct?

A. It is preferred to use periodic backup data to restore, because the data is used normally when backed up.

B. Restore all component data in the order of installation and deployment of FusionAccess

C. View the alarm, determine the failure time of the alarm component, and select the closest backup file before the failure time to restore

D. Start the recovery directly after confirming the recovery of the data