A supported database migration must minimize cutover downtime and verify business-data correctness before serving traffic from the target. Which two actions are appropriate? Select 2 answers.

1. Reconcile representative business records and validate target application behavior.
2. Assume a successful export includes transactions committed after the export snapshot.
3. Delete the source immediately after the initial copy to simplify rollback.
4. Use an initial copy followed by supported ongoing change replication.
5. Switch clients before checking replication lag or target consistency.