The correct answer is D) It increased production efficiency of a US cash crop that was in high demand in other nations.
The option that explains how the invention of the cotton gin contributed to the role of the United States as an emerging world power is " It increased production efficiency of a US cash crop that was in high demand in other nations."
The cotton gin invention came to revolutionize the production and selling of cotton in the United States. The cotton gin is a machine that separates the fibers of the cotton from their seeds. This, of course, was a much more quick procedure than doing by hand. Then you could produce linens and the separated seeds could be used again to put them on the soil and grow more cotton. Many people also used the seeds to produce cottonseed oil. This way, farmers had a more efficient and effective manner to produce cotton, seel it and export it.
Advances in transportation and communication changed the way that people lived. People could travel faster and farther by steamship, railroad, car, and airplanes. They could also communicate nationally and internationally by telegraph, telephone, and radio.
