What was a cultural change that occurred as a result of the Columbian Exchange? A. Europeans found new opportunities in America. B. Native Americans traveled to Europe for jobs. C. Native Americans became less dependent on livestock. D. Europeans became more isolated.

im almost positive the answer is a.

Explanation:

b and c are not true and the europeans began colonizing and growing bigger in the new world.

ummm? is that supposed to be a question or a but this is a reason he won re-election

explanation:

"despite progress in the war, lincoln and most political pundits were convinced that he would lose his bid for reelection in 1864. the country was war weary and the democratic party's nominee, george mcclellan, was likely to negotiate a peace treaty with the confederacy if elected." - loc.gov