How did thomas edison's invention of the light bulb affect industry? a. electric lights made it possible for factories to run after dark. b. having better lighting largely eliminated industrial accidents. c. bulb manufacturing became the biggest industry in the united states. d. brighter lights made people more productive, so they worked fewer hours.

in the 1800s, chinese workers migrated to the united states, first to work in the gold mines, but also to take agricultural jobs, and factory work, especially in the garment industry. chinese immigrants were particularly instrumental in building railroads in the american west, and as chinese laborers grew successful in the united states, a number of them became entrepreneurs in their own right. as the numbers of chinese laborers increased, so did the strength of anti-chinese sentiment among other workers in the american economy. this finally resulted in legislation that aimed to limit future immigration of chinese workers to the united states, and threatened to sour diplomatic relations between the united states and china.

some american cities felt workers were being oppressed by business monopolies