Modern approaches have tried to combine the thoughts of the previous schools; and  they have additionally mentioned the interaction between organizations and their environments. Three great developments have contributed to the improvement of modern management and organization theories: improvements in system theory, behavioral sciences, and quantitative methods. Modern management theories consist of the two important ones: Systems approach to organization and contingency theory. As also understood from the information given, the correct answer is “E”. As the first author of three important views representing classical management school, F. Taylor is the founder of scientific management. Bureaucracy theory, one of three important views representing classical management school, was developed by M. Weber.