Prior to 1750 and the onset of Industrial​ Revolution, very little economic growth occurred in the world. What marks the beginning of the Industrial​ Revolution?
A. The smelting of iron ore increased the use of​ durable, metal tools which made farming more productive.
B. When Eli Whitney invented the cotton​ gin, textile production increased​ world-wide.
C. Adding mechanical power to the production process increased the quantity of goods each worker could produce.
D. The​ newly-discovered spice trade routes opened up new markets for goods and increased demand for them.