In the Context of the Evolution of the Marketing Concept,the

In the context of the evolution of the marketing concept,the era of production orientation was characterized by _____.

A) the development of new technologies that made it possible to manufacture goods with ever increasing efficiency
B) a belief that sales were the primary means of increasing profits
C) the view adopted by businesspeople that advertising and personal selling were the primary means of increasing profits
D) the realization of entrepreneurs that they must first determine what customers want and then produce it
E) a belief that it was more effective to retain existing customers than it was to find new ones