Your organization needs to enforce that all resources be tagged with a cost center. Which Azure feature enforces this automatically?

Correct answer: Azure Policy

Option C is correct because Azure Policy is specifically designed to evaluate resources against defined business rules and can enforce tagging requirements automatically, denying the creation or modification of resources that lack required tags such as a cost center tag. Option A is wrong because Azure Blueprints is an orchestration service for deploying a set of artifacts (policies, role assignments, ARM templates) together as a package; while it can include policies, the enforcement mechanism itself is Azure Policy. Option B is wrong because Management Groups are containers for organizing subscriptions into a hierarchy for governance, not a tagging enforcement tool on their own. Option D is wrong because Azure Resource Groups are logical containers for grouping resources, and while you can apply tags to resource groups, they do not automatically enforce tagging on child resources.