The relationship between appetite and depression

Dr. Leonard conducts research on the relationship between appetite and depression. He has found that persons who experience depression often report a decrease in appetite. Which key difference between psychology and the physical sciences does Dr. Leonard’s research reflect? Question 31 options: A) Psychology often studies factors that can be either temporary or permanent. Physical sciences typically study factors that are permanent. B) Psychology examines how factors interact to influence the subject they are studying whereas physical science examines a single factor at a time. C) Psychology attempts to isolate and describe the smallest elements whereas physical sciences look at multiple factors. D) Psychology attempts to provide society with practical applications of research, whereas, physical sciences are more concerned with contributing knowledge to the discipline.