Answer:
a) Customer relationship management
Step-by-step explanation:
Customer relationship management -
It is the approach to manage the interaction of the company with the potential and current customers .
It is done by using data analysis of the history of the customer with the company , in order to improve the the relationship of the business with the customers , which focus on the retention of the customers and to increase the sale .
Hence , from the question information , the correct answer is a) Customer relationship management .