Final answer:
Coupons are certificates that provide buyers with savings when they purchase specified products. Unlike samples, which are free trial products, or premiums and patronage rewards that offer additional bonuses or loyalty points, coupons directly reduce the purchase price.
Step-by-step explanation:
The correct answer to the question is: C) Coupons.
Coupons are certificates or digital codes that consumers can use to receive a discount on the price of specific products or services when making a purchase. By presenting a coupon at the time of transaction, the buyer is granted a price reduction which effectively results in savings. For example, if you have a coupon that says 'Save $2 on Brand X Laundry Detergent', you would pay $2 less than the normal price for that item.
On the other hand, samples (A), are small quantities of a product given for free to consumers to try. Premiums (B) are items that can be received as a bonus for purchasing a particular product. Lastly, patronage rewards (D) are incentives given to customers for their loyalty or frequent business, typically in the form of points or credits that can be redeemed for products or services.