Algonquin books partnered with barnes & noble to offer a unique if you purchase one of 12 paperback books published by algonquin, you can choose one of 12 e-books for $3 (a much lower price than a regular e-book). the goal is to increase traffic in bookstores.

a. sales promotion
b. publicity stunt
c. direct marketing opportunity
d. advertisement

sales promotion

Explanation:

Sales promotion refers to a promotional mix's components.  In order to boost demand from consumers, generate market demand or enhance availability, sales promotion utilizes both press and anti-media marketing messages for a fixed, limited period of time.

Sales promotions could be guided for either buyer, sales personnel or representatives of the distribution platform. Consumer-focused sales promotions are labeled as retail sales incentives. Retailer and wholesale-oriented sales promotion are termed market sales promotions.

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answer/// there is an inverse relationship between price and quantity demanded;