Answer: tags

The correct answer is C (tags) because tags are specifically designed in Azure to add metadata to resources for organizational purposes, including identifying departmental ownership for cost allocation. As confirmed by the community discussion with 100% consensus and upvoted comments, tags allow you to assign key-value pairs (e.g., 'Department=Finance') to resources, enabling cost reporting and accountability tracking in Azure Cost Management. Options A (budgets) and B (alerts) are incorrect because they are used for setting spending limits and notifications, respectively, not for identifying departmental responsibility for costs. Budgets help control overall spending but do not inherently label resources with departmental information, while alerts notify about cost thresholds without attributing costs to specific departments.

Author: LeetQuiz Editorial Team