The winner of the Battle of Antietam was deemed inconclusive, although a tactical victory was claimed by the Union army and gave President Abraham Lincoln<span> the backing he needed to deliver the Emancipation Proclamation.</span>
It would be "(A) Institution of a secret ballot" that was not part of the Populist Party’s platform, since the Populists were largely about transparency--both within government and big business.
Britain was a bad place they just don’t know how hard it can be to be on their own