Final answer:
It is more cost effective to retain an existing customer than to acquire a new one.
Step-by-step explanation:
The correct answer is 3) more cost effective.
It is more cost effective to retain an existing customer than to acquire a new one. This is because acquiring new customers often involves higher costs, such as advertising, marketing, and sales expenses.
On the other hand, retaining existing customers is generally less costly as it requires maintaining good customer relationships, providing quality products or services, and offering loyalty programs or incentives.