When purchasing books on Amazon.com, customers are shown other books and a message saying "Customers who purchased [your book] also purchased . . ." This is an example of

A) mass media advertising.
B) publicity.
C) public relations.
D) sales promotions.
E) direct marketing.

Direct Marketing

A form of advertising where businesses communicate directly with customers through various channels like mail, email, or phone.

Mass Media Advertising

The process of conveying promotional messages to large, widespread audiences through mediums like television, radio, newspapers, and the internet.

Sales Promotions

Short-term incentives aimed at encouraging the purchase or sale of a product or service, such as coupons, discounts, and contests.