Answer:
Russia
Explanation:
most economic developed country
Inventions of the electric light, steam engine and railroads helped in the growth of U.S's Industrial boom in the 1900s during the Industrial Revolution bringing a rise for more labor. The invention of the railroad system, for example, made it possible to transport goods over long distances or a short period resulting in the creation of more jobs in various industries (Mantoux, 2013). These inventions of the industrial revolution affected workers, i.e., workers were paid poorly, child labor was introduced, cities were crowded and filled with diseases (Nelson, 1996).
Mantoux, P. (2013). The industrial revolution in the eighteenth century: An outline of the beginnings of the modern factory system in England. Routledge.
Nelson, D. (1996). Managers and workers: origins of the twentieth-century factory system in the United States, 1880–1920<span>. Univ of Wisconsin Press.</span>
History by the Eras
Should be the title.