The answer is C. As new colonists and explorers discovered the Americas, they also brought disease. This heavily impacted the American Indians as a majority of their population suffered from epidemics.
Abraham Lincoln was most popular in the Northern states. The states he won were anti-slavery. The candidate who won the electoral votes in the south was Jefferson Davis.
Don’t go to the links there hacks
The reason why labour leaders praised the Clayton Antitrust Act was because the Act prevented unions from being treated as trusts.