Answer:
The Kansas-Nebraska Act allowed each territory to decide the issue of slavery on the basis of popular sovereignty. Kansas with slavery would violate the Missouri Compromise, which had kept the Union from falling apart for the last thirty-four years.
Explanation:
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The correct answer here is the third option.
It is important to note that US has largely been an isolationist country since its creation and thus it was hard for an isolationist country to get involved in what many Americans saw as the European war. So in 1917 they created the Division of Pictorial Publicity in order to promote the war effort.
There were strong hostilities between the French and British. This meant that the French had a hostile behavior towards the British; they obtained unfriendliness and opposition towards them.<span />