The gantt chart, a bar graph that measures planned and completed work along each stage of production by time elapsed, is a tool developed and used in the approach of the classical perspective of management thinking. a. bureaucratic organizationsb. behavioral sciencesc. administrative principlesd. scientific management

The correct answer is: Scientific Management

Explanation:

The bar chart often called the Gantt chart, is a graphical time-scale of the schedule. It was created by Henry L. Gantt during World War I. It is a bar chart showing the progression of time through the phases of a project. It is easy to interpret, does not show the interdependence of activities,  does not integrate costs or resources with the schedule, and it is difficult to update.

The scientific management is known for its systematized knowledge used for work allocation and assignment of specific jobs. Taylor therefore tried to find out the basic principles of management by using time and work-study, detailed analysis, investigation and planning of work allocation.

Gantt made some important contributions to scientific management such as comparing plans with performance, task and bonus remuneration, teaching and training workers and emphasizing services carried out by workers.

3rd the reason why is because of management and leadership