The proper second step to refine a potential product is

• A. Test
• B. Prototype
• C. Design
• D. Evaluate

Answer: (A)

Testing is the step that turns ideas into real, measurable feedback. Once you have a tangible version of the product (a design or prototype), testing puts it through conditions that mirror how it will be used in the real world. This reveals how well it performs, where it fails, and what parts are confusing or fragile. With concrete data and observations, you know exactly what to change—dimensions, materials, tolerances, or features—so the next iteration truly improves the product. Evaluating overall performance and readiness comes after you’ve collected this evidence from testing, while design and prototyping are about planning and building the version you’ll test.