The correct answer is D. Max Weber
Step-by-step explanation:
Value neutrality is a term used in research to describe one of the most important aspects of ethics that is about remaining neutral or impartial during studies and avoid one's personal opinions, point of view or judgments interfere. This concept is widely used nowadays in almost any of research and was first proposed by Max Weber in 1949 not only because he was one of the most important figures in sociology and research studies, but because he was the first one that stated sociologist and researches need to strive to stay neutral ad tet carried on the process, analyzed the information and finally reported the findings. Additionally, this concept was later integrated and used by others including the American Sociological Association that focuses on sociological research. Therefore, the person that defined the concept of value neutrality was Max Weber.