Which service provides centralized management of Azure resources across multiple subscriptions?

Correct answer: Azure Management Groups

Option A is correct because Azure Management Groups provide a hierarchy above subscriptions that allows organizations to apply governance policies, access controls, and compliance settings consistently across multiple subscriptions and their contained resources. Option B is wrong because Azure Arc extends Azure management to on-premises and multi-cloud resources, but it does not serve as the primary tool for organizing and governing resources across subscriptions within Azure itself. Option C is wrong because Azure Resource Manager (ARM) is the deployment and management layer for resources within individual subscriptions, not a cross-subscription organizational hierarchy. Option D is wrong because Azure DevOps is a developer toolchain for CI/CD pipelines and project management, not a resource governance and subscription management service.