The answer is developed conclusions based on a systematic examination of data.
This option is correct. Emile Durkheim's study of suicide was scientific because he used a systematic approach to collect and analyze data. He examined various social factors and their correlation with suicide rates, which allowed him to draw conclusions based on empirical evidence.
This option is incorrect. Durkheim did not focus on the individual personalities of suicide victims. Instead, he looked at broader social factors and patterns that could influence suicide rates, such as social integration and regulation.
This option is incorrect. While Durkheim did work in a university setting, this alone does not make his explanation of suicide scientific. The scientific nature of his work is attributed to his methodology and use of data, not merely his academic environment.
This option is partially correct but not the primary reason his explanation was scientific. Durkheim did categorize suicide into four types (egoistic, altruistic, anomic, and fatalistic), but the scientific aspect of his work lies in his systematic data analysis and the development of theories based on that data.