During 1830 the five civilized tribes were removed from their ancestral homeland in the sentence what does the word ancestral mean

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.

i believe the answer is c

where is the subject? hahahaha