The correct option is Permissions are assigned according to the organization's defined roles and job responsibilities.

Role based access control assigns permissions to roles that represent job functions and responsibilities, and then users are granted those roles so they obtain the permissions needed to perform their duties. This approach enforces the principle of least privilege and reduces administrative overhead because permissions are managed at the role level rather than being administered individually for each user.

Google Cloud IAM predefined roles is not correct because RBAC is a general model that relies on organization defined roles and responsibilities. Cloud providers may offer predefined roles for convenience, but the RBAC concept is about mapping permissions to job roles rather than depending solely on vendor presets.

The user's own preference is not correct because access rights are determined by business needs and job responsibilities and not by what a user prefers. Letting users choose their own permissions would violate least privilege and undermine centralized control.

Based on the count of devices a user administers is not correct because RBAC does not base permissions on device counts. Device metrics do not define job roles and they are not the mechanism used to assign access under RBAC.

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