By which time did the automobile become a basic part of U.S. ...

[rachel9]

By which time did the automobile become a basic part of U.S. culture?
 
  a. the 1920s
  b. the 1930s
 c. the 1950s
  d. the 1960s

Question 2

The extent of family violence varies from one report to another because researchers
 
  a) are unskilled in research methods.
  b) use poor research methods.
  c) utilize different definitions of family violence.
  d) are often victims of family violence.

[carlsona147]

Answer to Question 1

B

Answer to Question 2

c) utilize different definitions of family violence.