One Important Benefit of the Emergence of a New Mass

One important benefit of the emergence of a new mass society was

A) greater unity between European factory workers and middle-classes, which together composed about 55 percent of the population.
B) increased voting rights for the lower classes.
C) development of a working class, comprising 45 percent of the population, whose numbers caused middle-class Europeans to fear a seizure of power by the workers.
D) greater equality between the sexes.
E) increasingly successful labor activism.