The key distinction is that Helm charts are packaging and deployment tools, while Operators extend Kubernetes controllers to provide ongoing lifecycle management. Option C is correct because Operators continuously reconcile the desired and actual state of custom resources, enabling advanced behaviors like upgrades, scaling, and failover. Helm charts, by contrast, define templates and values for deploying applications but do not actively manage them after deployment.

Option A oversimplifies; Operators do more than deploy, while Helm manages deployment packaging. Option B is incorrect—Helm does not create CRDs by default; Operators often do. Option D is incorrect because Operators and Helm serve different purposes, though they may complement each other.

Operators are essential for complex workloads (e.g., databases, Kafka) that require ongoing operational knowledge codified into Kubernetes-native controllers. Helm is best suited for standard deployments and reproducibility. Together, they improve Kubernetes extensibility and automation.