Multiple choice The formation of national labor unions in the late 1800s was mainly a response to passage of federal laws that favored workers laws restricting immigration and naturalization poor working conditions and low wages economic depressions that had led to high unemployment Reveal answer Fill a bubble to check yourself C Correct answer Explanation The rise of industrialization in the late 1800s led to dangerous working conditions, long hours, and low wages. Workers formed unions to collectively bargain for better treatment and pay.