Can you put the passage in order for me to answer the question.
In my opinion, the disruption of trade is most likely the MOST severe effect that resulted in the fall of Rome. Trade has always been vital because every country has something special to offer weather it be oil, wool, wine, and a wide variety of food. Being able to trade with countries like Spain, France, North Africa, and the Middle East provided them a wide range of objects such as wool, tin, and lead. If their trade was disrupted, they empire would crumble at a fast rate due to a lack of supplies that were once vital. There would be less money coming through, and chaos would reign.
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The best answer is 1)to justify US involvement in Latin America
Theodore used an argument known as the Corollary to the Monroe Doctrine, which established the United States not only as a guarantor of Europe staying out of Latin America, but also the right of the US to maintain heavy involvement in Latin American affairs.