Final answer:
The best design goal for a web application is to be 'walk-up-and-use', with an intuitive and easy interface that is achieved through iterative refinements and testing to ensure quality. So the correct answer is option B.
Step-by-step explanation:
A good design goal for a web application is to create an interface that is walk-up-and-use. This means that the application should be intuitive and easy to use without requiring extensive instructions or training.
Including every feature imaginable often leads to a cluttered and confusing interface, which hampers usability. Instead, design considerations should focus on the essential requirements and constraints to develop a prototype that is then tested and evaluated.
Testing reveals the quality of the design and indicates where refinement is needed. It is crucial to refine the design through testing and evaluation, identifying weaknesses, and making improvements until the application meets the desired criteria.