An undertaking to repair a customer's vehicle for a certain period after it has been sold is
Answer Details
After-sales service is the correct answer. After-sales service refers to the support provided to customers after they have purchased a product or service. This includes services such as repair, maintenance, and technical support. In this case, the undertaking to repair a customer's vehicle for a certain period after it has been sold is an example of after-sales service. The purpose of after-sales service is to ensure customer satisfaction, build customer loyalty, and increase the likelihood of repeat business.