An initial database copy completes, but the team needs proof that business data is complete and consistent before switching clients. Which approach best fits?

1. Check replication lag and execute the reviewed cutover procedure.
2. Assess engine features and application compatibility before selecting the migration path.
3. Perform the initial copy, replicate changes, then use a planned final synchronization and cutover.
4. Validate row counts, checksums where suitable, and application-level reconciliation.