What do you believe was the single greatest threat to the ability of the former British colonists to forge the nation of the United States of America?

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.

formulating the initial idea for the policy

answer is c.