Read these lines: "In general, the longer a customer stays with a company, the more that customer is worth. Long-term customers buy more, take less of a company's time, are less sensitive to price, and bring in new customers. Best of all, they require no acquisition or start-up costs. Good long-standing customers are worth so much that in some industries, reducing customer defections by as little as five points can double profits." What is the main point of the quoted lines?

1. Every quoted sentence stacks up value on the side of the long-term customer: they buy more, cost less time, accept prices, recruit others, and need no acquisition spending. 2. The closing figure drives it home, since cutting defections by five points can double profits in some industries. 3. So the main point is that holding on to loyal customers is enormously profitable. 4. The new-customer option reverses the comparison; the quoted lines say long-standing customers are the valuable ones. 5. The demanding option contradicts the quoted lines, which say these customers are less sensitive to price and take less time. 6. The defection option misreads the five points, which measure a reduction worth achieving, not a loss worth allowing. _Source: OpenStax Introduction to Business (CC BY 4.0), Ch 1 "Understanding Economic Systems and Business", section 1.8 Trends in the Business Environment and Competition_