A. Boomtowns because railroads made traveling easier and new farm Machinery made the industry happen easier on faster
The primary objective of the treaty is C, to limit the number of warships.
The purpose of the three neutrality acts was B, to keep the US out of another world war.
D.
the deliberate modification of Earth’s surface through cultivation of plants and rearing of animals
In California? Because as of Sep 8, 2020, 2 million acres have been burned.