The answers is B because many immigrants because they were seeking greater economic opportunity
World war 1 broke out in 1914 because a group of Serbian nationalists (The Black Hand) assassinated the duke of Austria-Hungary. Austria -Hungary threatened Serbia with a bunch of wishes that they wanted Serbia to due for them. Due to the treaty between Serbia and Russia, Serbia said no. Germany, who had a treaty with Austria-Hungary threatened to attack if Russia mobilized its army. Russia did and Germany invaded Belgium. This brought Great Britain and France into the war.
The answer is A, natural selection.
The Battle of Saratoga, comprising two significant battles during September and October of 1777, was a crucial victory for the Patriots during the American Revolution and is considered the turning point of the Revolutionary War. The Battle was the impetus for France to enter the war against Britain, re-invigorating Washington’s Continental Army and providing much needed supplies and support.
Slaveholders wanted to expand slavery west, and conflict broke out between anti-slavery and pro-slavery Americans in Kansas I.E Bloody Kansas.
2. Because it set the precedent through the Supreme Court that blacks whether free or still in slavery were not citizens and were considered property (if slaves), therefore could not sue in court. The north was primarily against slavery whereas the South was pro-slavery.
