a company has an excess of puffer jackets at the end of the season that it wants to sell quickly. in order to quickly sell this excess inventory, they send out emails to customers currently in their database. however, they want to determine what type of sale their customers find most motivating, so they send out three different emails with different discounts (bogo free, 50% a purchase over $100, or free expedited shipping). the information gained during this campaign will be tracked, and customers who made purchases will receive similar email offers in the future. what type of crm strategy is the company using?