The workers in Alpha manufacturing company were using traditional methods for production of metal parts. Since no standard procedure existed, workers relied on personal experience and guess work. As a result, productivity in the assembly line began to decline. To improve productivity, the company hired a consultant specializing in scientific management. The consultant explained that there was only one best method to maximize efficiency and this method could be developed through proper study and analysis. He emphasized that the scientific method should replace the old method, that the workers were using. So, to develop the scientific method, the consultant carefully investigated the traditional methods through work-study and by unifying the best practices, he developed a standard method that would be followed by everyone in the organization. After applying scientific method, there was a three fold increase in productivity within six months. The principle of scientific management which helped the company in increasing the productivity was : (A) Science, not Rule of Thumb (B) Harmony, Not Discord (C) Cooperation, Not Individualism (D) Development of Each and Every Person to His or Her Greatest Efficiency and Prosperity