Question: Suppose that the Proctor & Gamble Company, manufacturers of Crest brand toothpaste, runs a promotional campaign that offers a small, travel-sized tube of toothpaste for customers who purchase a regular-sized tube. The travel-sized tube of toothpaste comes at no extra charge, and is attached via packaging to the regular-sized tube. What type of sales promotion is this? A rebate A frequent-user incentive A buying allowance A premium