Which prototyping method allows for demonstration of how a solution operates?

The correct choice is simulation because this prototyping method creates a dynamic model that can mimic the functionality of a system or solution in a controlled environment. This allows stakeholders to interact with the prototype in real-time, providing a clear demonstration of how the solution operates under various scenarios. Simulation effectively helps in visualizing complex processes, testing system behaviors, and allowing users to experience the product before it is fully developed.

In contrast, while storyboarding provides a visual representation of user interaction, it typically does not offer any interactive functionality or operational demonstration. Interoperability testing focuses on assessing how different systems or components work together, rather than showcasing how a single solution operates. Role playing can help in understanding user interactions but lacks the technical execution and demonstration capabilities offered by simulation.