The passage suggests that bank managers failed to consider whether or not the service impr
A.was too complicated to be easily described to prospective customers
B.made a measurable change in the experiences of customers in the bank’s offices
C.could be sustained if the number of customers increased significantly
D.was an innovation that competing banks could have imitated
E.was adequate to bring the bank’s general level of service to a level that was comparable with that of its competitors