The railroad boosted the economic status of the USA the transportation of raw materials and manufactured good to and from industries became faster and easier after the completion of the railroad
I would say trading cities became more important
Option C, It declared slaves to be in bondage even in free states or territories, is the right answer.
The supreme court of the United States on March 6, 1857, asserted that a Slave ( Dred Scott) who was living in the free state and territory of the United States was not allowed to his freedom and that the African -Americans were not and could never be subject of the U.S. Citizenship. Supreme Court also declared that Congress had no power to exclude slavery from the territories of U.S. This became Abolitionists (the White Northerners, who opposed Slavery) outraged from the decision made by the Supreme Court.
Swahili culture is the product of the history of the coastal part of the African Great Lakes region.
By the 8th century, the Swahili people became involved in the Indian Ocean trade. As a consequence, they were influenced by the Arab, Persian, Indian and Chinese cultures.
As well as in the Swahili language, Swahili culture has a Bantu core and has also borrowed foreign influences. This Bantu expansion introduced the Bantu peoples in central, southern and southeastern Africa, regions of which they were previously absent. They gradually evolved to accommodate an increase in trade (mainly with Arab traders), population growth and even more centralized urbanization, developing what would later become known as the Swahili city-states.
As we can see Arab settlers particularly influential along the Swahili coast because they were the Bantu's major trading partner.
They named themselves the middle kingdom because they saw themselves as the center of the world.
