Key is “to manage the compliance of Azure Resources”
A. “No change is needed” > Not correct because the sentence has no sense.
B. “Management groups” > Manage subscriptions. > Not correct in the context, the sentence is about manage resources.
C. “Azure policies” > CORRECT, the only one valid.
D. “Azure App Service plans” > it has no sense.
Resource group: Resources combination, logical container deployed and managed (web apps, dddbb, and storage accounts).
Management Groups: Help to manage access, policy, and compliance for multiple subscriptions.
Azure policy: Service in Azure that enables you to create, assign, and manage policies that control or audit your resources in the way to get compliance with your business rules.