During Which Period Was There a Paradigm Shift from Moralistic

During which period was there a paradigm shift from moralistic tradition toward use of social science to collect data on the impact of social and physical elements of human problems?

A) the social, physical, and natural environments from 1930 to 1945
B) social work approaches from 1920 to 1930
C) the emergence of social work from 1890 to 1920
D) the pre-professional era from 1870 to 1890