Which of the following is TRUE regarding a manager's job with respect to customers?

a$.$ Managers have not yet recognized the importance of delivering consistent high$-$quality customer services.

b$.$ Today, the majority of employees in developed countries work in product sectors$.$

c$.$ Customers need not understand anything about the organization providing goods or services.

d$.$ Employees play an insignificant role in delivering quality customer services.

e$.$ Managers must create a customer$-$responsive organization in order to survive successfully in today's environment.