Your subscription contains resources in multiple Azure regions. Which Azure resource should you create to satisfy the policy requirement?

An Azure Policy allows you to enforce rules and effects on your Azure resources, ensuring they comply with your organization's standards and service level agreements. This is the correct choice because policies can be scoped to subscriptions and apply across multiple regions, making them ideal for enforcing requirements across geographically dispersed resources. A read-only lock prevents accidental deletion or modification of resources but doesn't enforce policy requirements. A management group is used to organize subscriptions and apply governance at scale, but it's not the direct mechanism for enforcing policies; policies are applied to management groups. A reservation is used to save money on compute costs and is unrelated to policy enforcement.