CedarHealth has completed an initial database copy while the source continues receiving writes. The target is not yet serving users. Which evidence is needed before cutover?

1. Only the target instance’s CPU utilization at idle.
2. Validated application behavior, acceptable replication lag, and a reviewed final synchronization and rollback procedure.
3. Immediate deletion of the source to force clients to use the target.
4. Only the successful exit status of the original export job.