Which of the Following Statements Is Not True About Trends

Which of the following statements is not true about trends in sociologists' study of cities?

A) Sociologists' generalizations about cities and their typical cultures and mentalities were affected by the predominant demographic movement at the time.
B) Early sociologists focused on the ways increasing urbanization caused detachment and impersonality.
C) Postwar sociologists were concerned about the effects of the movement to suburbs, such as cultural conformity and the segregation of classes and ethnic groups.
D) Postwar sociologists assumed that most Americans fled for single-family houses and suburban life as soon as they could afford to do so.
E) None of the above