Final answer:
Option C: The correct answer is that the program should be designed, built, and tested by the student, following a methodical design process that adheres to project constraints and criteria.
Step-by-step explanation:
The program that you submit for your touchstone should be designed, built, and tested by you. This involves selecting a design concept that meets certain constraints and criteria, and is typically chosen through a structured decision process. Once the best concept is selected, the next steps include detailed design, prototyping, and testing the design to ensure it functions as intended.
Throughout the process, from selecting a design concept to final testing, the student must ensure that each phase adheres to set constraints and satisfies the criteria outlined for success. If a solar still for desalination was selected as the best design concept, then subsequent steps would reflect decisions tailored to developing and testing that particular design. The aim is to deliver a well-thought-out and tested product, demonstrating a thorough