Which of the following describes the contour diagram for the function 
(with m on the vertical axis and d on the horizontal axis) ?
Definitions:
Durkheim
Émile Durkheim, a French sociologist, formally established the academic discipline of sociology and is best known for his theory of social integration and his studies of social cohesion and collective conscience.
Color Line
A term that describes the division of race and the systemic inequalities and segregation between white and non-white people, originally focusing on the division between blacks and whites.
W. E. B. DuBois
An influential African-American sociologist, historian, and civil rights activist known for his contributions to the understanding of the African-American experience and the fight for equality.
Empirical Analysis
The use of observed and measured phenomena to investigate relationships and test theories.
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