The understanding that keeping existing customers is less expensive than attracting new ones is at the heart of what marketing concept?

A.
customer relationship management

B.
marketing information systems

C.
persuasive rhetoric

D.
marketing research

A. customer relationship management

The understanding that keeping existing customers is less expensive than attracting new ones is at the heart of the marketing concept known as customer relationship management (CRM). Therefore, the correct answer is A. customer relationship management.