The US's declaration of war against Spain in 1898.
Answer:
this is the best answer but is not completely correct: b- creating a free market
Explanation:
he introduced market-like characteristics into their economy
Answer: Manufacturing was a key part of the economy in the Northeast
Explanation:
After the War of 1812, there was a quick expansion of the northern industrialization. In New England was the first area to develop industrialized manufacturing, building water-powered textile mills, as well as mill towns to hold them, next to the rivers of the Northeast.
From New England, manufacturing soon spread to other states in the Northeast as well as other regions of the United States.