How did nationalism affect the economy starting in 1816?

Imma say this  1816, which worked to protect American industry from European manufacturers. In 1816 the second Bank of the United States was created.How did nationalism guide foreign policy? Treaties strengthened and expanded national boundaries; the Monroe Doctrine demanded Europe cease any new colonizing activity in the Americas.What were the major developments of transportation between 1800 and 1860? Major developments of transportation included toll roads, steam boats, canals railroads, textile mills, and also interchangeable parts.

Explanation:

i think the answer would happen to be the letter b

because the bar never runs out

couples always argue