Correct Answer. B. Implement role-based access controls to ensure that employees only access data necessary for their roles Role-based access control (RBAC) is crucial in protecting proprietary systems by limiting access to sensitive information based on the user's job responsibilities, enhancing data security.
Option A is incorrect as open access can lead to unnecessary exposure of sensitive data.
Option C is incorrect because providing universal administrator-level access increases security risks significantly.
Option D is incorrect because password frequency updates should balance security with user convenience, and biannual changes might not be sufficient for sensitive systems.