Historians critical of the captains of industry and capitalism in the postCivil War era generally ...

Historians critical of the captains of industry and capitalism in the postCivil War era generally concede that class-based protest
 
  a. was a more galvanizing and more violent phenomenon among the lower classes in the United States than it was in Europe.
  b. was less than in Europe because of America's greater level of social mobility.
  c. was dampened by the fact large numbers of Americans in postCivil War era made small improvements in their economic and social status.
  d. was diluted by differences in social mobility, according to race and ethnicity.
  e. All of these choices are correct.