An application needs to scale from 2 to 50 pod replicas based on CPU utilization. Which Kubernetes resource should you configure?

1. A Cluster Autoscaler
2. ✓ B Horizontal Pod Autoscaler (HPA) (correct answer)
3. C Vertical Pod Autoscaler (VPA)
4. D DaemonSet

Shortcut: HPA scales pod replicas horizontally based on observed metrics (CPU, memory, custom metrics). VPA adjusts resource requests/limits on existing pods.