There are three approaches to public administration, namely the managerial approach, the political approach and the legal approach. Which one of the following statements best describe the managerial approach: a. The business part of government; doing things with the utmost possible efficiency, b. The mathematical relationship of ethics; specialisation of bureaucratic principles. c. Political neutrality in competence; orderly procedures and methods. d. Promotion of personal views of individual public servants; improvement of group efficiency, effectiveness and productivity