The following four factors contributed to US expansion:
-
The media was shifting public opinion in favor of expansion. - Newspapers and other forms of media played a significant role in promoting the idea of expansionism and Manifest Destiny, influencing public sentiment.
-
The Industrial Revolution made the US want to acquire more raw materials. - The rapid industrialization of the US increased the demand for raw materials, leading to territorial expansion to secure these resources.
-
The US was experiencing new nationalism after the Civil War. - After the Civil War, a spirit of nationalism grew, fueling the desire for expansion and the belief in American exceptionalism.
-
The Industrial Revolution made the US desire new markets. - With increased production capabilities, the US sought to find new markets for its goods, prompting expansionist policies.
The other options, while they may have elements of truth, are not as widely recognized as primary motivations for US expansion during that period.