Final answer:
Customers who receive personalized service usually remain the most loyal because personalization creates value and understanding, fostering a stronger relationship compared to one-time discounts or lack of interaction.
Step-by-step explanation:
When evaluating which of the following customers usually remain(s) loyal, it is generally found that Customers who receive personalized service tend to show higher levels of loyalty to a business. Personalized service often makes customers feel valued and understood, which increases their chances of returning. While one-time discounts can be appealing, they do not necessarily create a lasting relationship or loyalty. Customers who experience occasional issues may remain loyal if their problems are resolved satisfactorily, but this is not a given. Finally, customers with no interaction with the staff miss out on the opportunity to build a personal connection, thus are less likely to develop loyalty.