The main approach of Educational, Management is:

Educational management refers to the process of planning, organizing, directing, and controlling educational resources and activities to achieve the goals of the educational system. 

Key Points

•  The main approach of educational management is influenced by all of these factors: social justice, social demand, and manpower development.
• Social justice ensures that all individuals, regardless of their background, have access to quality education, promoting equality and fairness.
• Social demand focuses on addressing the needs of society, ensuring that education meets the demands of the community, the economy, and the labor market.
• Manpower development aims at creating a skilled and knowledgeable workforce, aligning education with the needs of industry and society.
• Therefore, all these approaches are interrelated and contribute to the effective management of education to meet both societal and individual needs.

Hence, the correct answer is all of the above.