Answer:
The Kansas-Nebraska Act was designed to accomplish to divide the area west of Iowa and Missouri into two territories. Some of the intended was splitting of land and unintended was the conflict and the violence. They allow each territory to decide the issue of slavery on the basis of popular sovereignty.
Explanation:
Another way to ask that question would be: Which European country was most active in exploration and expansion into Africa in the 15th century. The answer: Portugal. Along with their commercial interests, they also brought their religion with them. The spearhead of the Portuguese expeditions to Africa was Prince Henry, dubbed "the Navigator." He didn't actually go sailing, but he was the driving force behind the Portuguese campaigns to go spread their influence--and their Catholic Christianity--to other parts of the globe.
The answers are going to be 1, 3, 4, 5
The reasons for the fall of the empire include military overreach, invasion by emboldened tribes of Huns and Visigoths from northern and central Europe, inflation, corruption and political incompetence.