The promotional mix includes various elements used to promote a product or service. In this case, the example of the promotional mix among the given options is:
d.) Sending out mailers with a 20% off discount
This is an example of a promotional mix as it involves direct marketing to potential customers by sending out mailers with a discount offer. This strategy aims to attract customers by providing them with an incentive to make a purchase, thereby increasing sales and generating interest in the product or service being promoted.
