Final answer:
Sales-wave research is true to be a swift and direct method to evaluate a new product's potential without needing final packaging and advertising.
Step-by-step explanation:
The statement that sales-wave research can be implemented quickly and carried out without final packaging and advertising is true. Sales-wave research is a technique used in market research to assess the potential success of a new product or a change in an existing product. It involves exposing consumers to a product in a controlled environment where they can experience it firsthand, often without the influences of packaging and advertising. This method allows companies to gather feedback on the product itself, separate from other market variables, to see if the product concept has potential with consumers.