Final answer:
The 'Model' stage in the engineering design process is demonstrated by scenario A, where a team develops a prototype from a chosen solution for testing.
Step-by-step explanation:
The correct scenario that exemplifies the "Model" step in the engineering design process is A. After choosing one solution to try, the team develops a prototype so it can be tested. In the engineering design process, the modeling step involves developing a prototype based on one selected solution. This is done before extensive testing and refinement. It's crucial to understand that the prototype serves as an early model of the final design, which allows the team to assess its viability and make necessary improvements.