Was Europe isolated at the beginning of the Age of Exploration

Europeans had not been completely isolated from the rest of the world before the 1400s. ... That changed by the early 1400s. The desire to grow rich and to spread Christianity, coupled with advances in sailing technology, spurred an age of European exploration.

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the answer is c.richard m. nixon

lincoln presided over the union victory in the american civil war, which dominated his presidency. a former whig, lincoln ran on a political platform opposed to the expansion of slavery in the territories. his election served as the immediate impetus for the outbreak of the american civil war.