One of the reasons marketers use loyalty segmentation is

The high cost of finding new customers.

Explanation:

Loyalty segmentation is when customers are grouped based on how they interact with you product and services. It is aimed at identifying those that use a business's products and services frequently or that are loyal to the business.

Loyalty segmentation is preferred by marketers because it maximises the lifetime value of customers. It is expensive to get new customers, so marketers maintain already existing relationships.

24 years, i believe is the correct answer.

answer; ///(d); determining who competes most closely   with whom evaluating whether industry driving forces and competitive pressure favor some strategic groups and hurt others, and ascertaining whether the profit potential of different strategic groups varies due to the strengths and weaknesses in each groups respective market positions;