The proposed solution of simply adding a "new case statement" is incomplete and fails to meet the goal for two primary reasons. First, the prompt explicitly states you must extend the enumeration (TruckStatus). In a production environment (like D365 F&O), standard enums are often non-extensible, requiring the creation of an extension or a new enum. Second, adding a case statement to the switch block only handles the logic for the new values; it does not "validate" the switch statement in a way that ensures all possible enum values are accounted for. To properly "validate" or handle extensions, a default case or a specific validation logic must be implemented to manage values not explicitly defined in the original switch structure.

A. Yes This is incorrect because adding a case statement handles the execution flow for specific values but does not fulfill the requirement to extend the underlying data structure (the enumeration) itself.

Microsoft Learn (Dynamics 365): "Enumerations as Extension" – Documentation on how to add new values to an existing enum via extension rather than just modifying code.

Microsoft Learn: "X++ Switch Statements" – Details on switch syntax and the importance of the default case for handling unexpected or newly added enum values.

MBS Microsoft Dynamics 365 Development: Section on "Extensibility" – Explains that adding cases to a switch in a base model requires a code wrap (Command Chain) or event handler if the base code is locked.