Answer: A systematic, oppressive treatment based on racial group membership and the beliefs, behaviors, institutional organizations, or attitudes that favor one group over another.
Explanation:
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.
D) it protects our nation
