Which of the Following Statements Concerning Customer Defection Rates Is

Which of the following statements concerning customer defection rates is incorrect?

A) Defection rates are determined by customer loyalty.
B) The longer a company holds on to a customer, the greater is the volume of customer-generated unit sales and the lower is the average cost of each sale.
C) Lowering customer defection rates allows a company to achieve a lower cost structure.
D) Research and development should address the issue of customer loyalty in product development.
E) There is a positive relationship between the length of time that a customer stays with the company and profit per customer.