The correct answer is C - Role-based access control (RBAC).
WGU KFO1 / D488 course material emphasizes that RBAC allows administrators to assign permissions based on roles rather than individual users. This method provides granular control and flexibility, allowing the organization to efficiently manage access rights across multiple cloud services while maintaining a strong security posture.
OAuth (A) and SAML (B) are protocols for authentication and authorization, not detailed access control models. Kerberos (D) is used for secure authentication within a network but does not provide the granular delegation capabilities needed for cloud service administration.
Reference Extract from Study Guide:
"Role-based access control (RBAC) provides a scalable and manageable model to assign permissions to users based on their organizational roles, ensuring flexibility and maintaining secure delegation of administrative tasks."
- WGU Cybersecurity Architecture and Engineering (KFO1 / D488), Access Control Models