Answer:
Option D, The export of cotton increased by 50% between 1800 and 1860, is the right answer.
Step-by-step explanation:
The Industrial Revolution was a period of time during which a number of inventions took place. During this period the invention of Cotton Gin was a significant invention. Invented in the year 1793 by Eli Whitney, the cotton gin led an increase in the export of cotton by 50% between the decades 1800 and 1860.