a period in the political history of the US during the president Monroe's administration that reflected a sense of national purpose and a desire of unity among Americans in the aftermath of the war of 1812
They helped to end slavery
I believe it's
A. because after WW1 the US isolated itself from everyone else to focus on only the US. :)
Answer:
their communities are so compact that diseases spread faster than you'd expect. plus the fact that their water they drink isn't very clean.
Explanation:
