What are some facts about the battle of lexington

What did the central and union pacific build? transcontinental railroad transcontinental highway transcontinental trail transcontinental path

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Prior to the presence of europeans on the continent, the slave trade in africa a) did not exist in any form. b) was limited to internal trade only. c) included the trans-saharan and indian ocean slave trade. d) was rarely needed due to the lack of an agricultural economy.