To sell a product, the quality of the product and the integrity of the dealer are indispensable. All the following items are consistent with the conclusion of the question, except. ['A product is slow-selling, indicating that he is either of poor quality, or the dealer lacks integrity.', 'A product can only sell well if it is of high quality and distributed by honest people.', 'A product is selling well, indicating that it is a high-quality and honest dealer.', 'A product cannot sell well unless it has a distributor of high quality and integrity.']