You must guarantee that a critical pod is rescheduled elsewhere if its node is drained, and that at least 2 replicas stay available during voluntary disruptions. Which object do you create?

1. A HorizontalPodAutoscaler
2. ✓ B PodDisruptionBudget with minAvailable: 2 (correct answer)
3. C ResourceQuota
4. D PriorityClass

Shortcut: A PodDisruptionBudget constrains voluntary disruptions such as node drains and upgrades. minAvailable: 2 blocks the drain from evicting below two ready replicas.