A restaurant manager gives a survey to all of his customers asking them to rate the quality of the service they received. He then keeps track of how many customers return to the restaurant during the next six months. Last year, the results showed that of the customers who reported high quality service, 90% returned for additional meals. What conclusion can be drawn from this study? (6 points) Select one:
a. Only some customers who rate their service as high quality return for additional meals.
b. Most customers who rate their service as high quality return for additional meals.
c. High quality services cause customers to return for additional meals. d. Customers who will return for additional meals report a high quality of service.