Final answer:
Customer complaints should be welcomed to address and improve on issues.
Step-by-step explanation:
Customer complaints should be welcomed according to customer service principles because they provide opportunities for the company to address and improve on issues. By listening to and addressing customer concerns, a company can identify areas for improvement and provide better products or services. For example, in a fast-food restaurant, if customers complain about the confusing line-up system, the manager can take action to resolve the issue by implementing clear floor markings to guide customers. As a result, customer complaints decrease, stress is reduced for employees, and more customers can be served efficiently.