What Do Retail Outlets Hope to Achieve from Using Promotions

What do retail outlets hope to achieve from using promotions in conjunction with markdowns?

A) Bulk purchase of products, which reduces brand switching and, in turn, increased consumption
B) Increased loyalty of customers based on discounts tailored to suit individual customers
C) An increase in store traffic that leads to the purchase of non-promotional products at regular prices
D) Increased savings for customers and increased profits, without actually cutting prices
E) Selling off less desirable products by including them in a package with more desirable products