According to one theory, how did the earliest people come to the americans?
a-african tribesmen sailed large ships to the caribbean islands.
b-europeans traveled across a land mass that connected europe and north america.
c-native americans migrated to asia and brought others with them when they returned.
d-southeast asians sailed across the pacific ocean to north america.

a.tensions between the colonial elites and the backcountry men of virginia.

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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