Why is the rapid expansion of unions related to the rise of industrialization in the United States in the nineteenth and twentieth centuries? Choose all that apply.

	Industrialization led to horrendous working conditions.
	Industrialization decreased productivity, which led to unmet demands by workers.
	Industrialization replaced skilled tradespeople and artisans with unskilled laborers, shifting power from workers to employers.
	Industrialization led to heavy enforcement of government regulations, which spurred the growth of unions.