You are developing a web application with various user roles, each with different access levels to the application’s resources. How would you design the authorization system to ensure proper access control, scalability, and maintainability?

To ensure proper access control, scalability, and maintainability in a web application with multiple user roles, you should use a role-based access control (RBAC) system. RBAC allows for fine-grained control over user permissions and is scalable as your application grows. The other options are not recommended, as they lack proper access control or are not scalable.