Need asap! three questions how did the war of 1812 most affect the u. s. economy? a) disruption in trade contributed to domestic industrial growth. b) small farmers benefited from higher export prices for grain crops. c) the sale of treasury bonds to international companies was prohibited. d) new trade alliances resulted in increased foreign investment. 7) how did this invention (the cotton gin) contribute to the expansion of the plantation system? a) by reducing the number of slaves needed for growing cotton b) by increasing the time needed to cultivate cotton c) by increasing the profitability of slavery d) by reducing the demand for raw cotton 8) which of these occurred during early u. s. industrialization? a) manufacturers instituted a five-day workweek. b) labor laws required factories to provide a safe working environment. c) workers were required to attend schools to develop technical skills. d) production of goods transitioned from homes to factories.