A batch workload is restartable and can tolerate interruptions. Which option may reduce compute costs if its operational constraints are satisfied?

1. Use preemptible capacity while forbidding all job retries.
2. Assume a lower-cost shape guarantees identical processing time.
3. Require the workload to hold its only state in local ephemeral memory.
4. Evaluate preemptible capacity with checkpointing and retry behavior.