[T]hey wanted . . . a fifty-two-hour week with extra pay for overtime, an end to the fines and petty tyrannies, and a living wage.

—We Shall Not Be Moved,
Joan Dash

Which historical detail helps clarify your understanding of the sentence?

Different ethnic groups all worked together on the strike.
There were 80-hour workweeks, low pay, and fines for long bathroom breaks.
More than 20,000 workers went on strike.
Many of the workers were immigrants from Eastern Europe and Italy.[