When does a permission from a child security role appear in the parent security role?

The correct choice reflects the nature of how security roles are structured in many systems that utilize hierarchical or relational security settings. A parent security role is meant to encompass all permissions from its child roles by design. This hierarchical model allows organizations to maintain a clear and manageable permission structure.

When a permission is defined in a child security role, that permission will automatically be included in the parent security role regardless of any specific conditions or overlaps with other permissions. This ensures that users assigned to the parent role inherit all permissions granted to any child roles, creating a comprehensive access framework that is easy to manage and understand.

The other options present scenarios that do not accurately describe the nature of role inheritance, as permissions are always included rather than contingent on matching criteria, absence of constraints, or overlap. This structure promotes consistency and ensures that all relevant permissions are accounted for, streamlining permission management.