What Was the Significance of the Years Following the Industrial

What was the significance of the years following the Industrial Revolution to the marketing research industry?

A) The early development of questionnaires,which were put into use providing marketing researchers with a method of gathering new information from customers,dealers,and competitors,occurred.
B) Companies were separated from their customers,and there was a need to understand faraway markets.
C) Marketing research became fully accepted;formal recognition of the marketing research function led to the creation of marketing research departments.
D) High-tech products such as CARDs,CATIs,SPSS,and DBMs developed.
E) Nothing really changed in the marketing research industry after the Industrial Revolution.