Question: Jason is a sales representative for Ace Tires, a company that focuses on manufacturing tires for the trucking industry. Jason is meeting with a trucking company that delivers lumber to construction retailers. Which of the following would be the most effective proof device to demonstrate the benefits of Ace Tires? a) a detailed PowerPoint presentation b) a test-drive in which the buyer can feel the difference in tires c) a testimonial from another buyer about the excellent post-sale service d) a research report showing decreased fuel costs from using the tires e) a series of questions designed to discover what the buyer needs