Answer:
A) customer value marketing
Explanation:
Customer value refers to the value that our customers assign to the products or services that our company sells them. In other words, is the cost of our product or service offset by the benefits that we receive from consuming it. As long as the equation is always favorable to our side, i.e. perceived benefits > cost of our product, our customers will continue to purchase our products or services.
Customer value marketing tries to continuously increase the customers' perceived benefits, therefore always keeping the equation favorable to our side.