How did technology lend to geography expansion and growth of cities in the 1800s in the United States?

The rapid expansion of big business, the development of large-scale agriculture, and ... An outburst of technological innovation in the late 19th century fueled this ... making the United States the world's premier food producer--a position it has ... This led to wars against the Native Americans of the Plains.

answer; (d) i believe that the correct answer is americans finally ran out of ammunition;

world war i began in 1914, after the assassination of archduke franz ferdinand, and lasted until 1918. during the conflict, germany, austria-hungary, bulgaria and the ottoman empire (the central powers) fought against great britain, france, russia, italy, romania, japan and the united states (the allied powers). to new military technologies and the horrors of trench warfare, world war i saw unprecedented levels of carnage and destruction. by the time the war was over and the allied powers claimed victory, more than 16 million people—soldiers and civilians alike—were dead.

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