Which Azure construct lets you apply governance across multiple subscriptions?

Management Groups are the correct answer because they provide a level of organization above subscriptions, allowing you to apply policies, access control, and compliance across multiple subscriptions simultaneously. This hierarchical structure simplifies governance for large organizations. Azure Resource Groups organize resources within a single subscription, not across multiple. Azure Blueprints define a repeatable set of Azure resources and policies but are deployed at the subscription level. Azure CLI is a command-line interface for managing Azure resources, not a governance construct itself.