During the Columbian Exchange, which way did plants, animals, diseases, and people flow?

i told you before its c

answer; ///i believe that the correct answer is (a) the great depression

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.