The Key to Ensuring That a Customer Continues to Patronise

The key to ensuring that a customer continues to patronise the business after experiencing failures in service quality is ________.

A) whether an actual individual can be blamed for the failure
B) the dollar amount of the service in question must be low
C) the number of employees who apologise
D) the level of the individual who resolves the complaint
E) the speed with which the complaint is resolved