Some marketers calculate customer lifetime value (CLV) by adding up the total revenues generated from a customer relationship, but a more accurate version of CLV is found by _______. a. adding total revenues generated from a customer relationship and subtracting the acquisition cost b. adding total revenues generated from a customer relationship and subtracting all costs associated with maintaining the customer relationship c. adding total gross profits generated from a customer relationship and subtracting the acquisition cost d. adding total gross profits generated from a customer relationship and subtracting all costs associated with maintaining the customer relationship