The correct answer is letter B
During the First World War (1914 - 1918), while the countries of Europe were completely involved in the war process, and therefore with their affected industries and production, the United States started to supply Europe's demand for products such as steel, food, machinery, coal and other basic items for maintaining the war. Since the Civil War, the United States (861-1865) had been producing weapons and ammunition on a large scale, and being on the other side of the Atlantic Ocean, it benefited from producing to supply the need for war, with virtually no attack on its territory.
Until that time Britain was considered the nation of world economic supremacy, dictating the entire economy through the value of gold. However, it is from this context of the First World War that England loses its position and the USA starts to take its place.
During the First World War (1914 - 1918), while the countries of Europe were completely involved in the war process, and therefore with their affected industries and production, the United States started to supply Europe's demand for products such as steel, food, machinery , coal and other basic items for maintaining the war. Since the Civil War, the United States (861-1865) had been producing weapons and ammunition on a large scale, and being on the other side of the Atlantic Ocean, it benefited from producing to supply the need for war, with virtually no attack on its territory.
Until that time Britain was considered the nation of world economic supremacy, dictating the entire economy through the value of gold. However, it is from this context of the First World War that England loses its position and the USA starts to take its place.