Final answer:
The invention that spurred the rise of the Cotton Kingdom and fueled demand for slaves was the Cotton Gin, invented by Eli Whitney. So, the correct answer is option b.
Step-by-step explanation:
The 1793 invention that spurred the rise of the Cotton Kingdom and fueled demand for slaves was the Cotton Gin, invented by Eli Whitney. The cotton gin was a machine that removed seeds from cotton, reducing the labor required to process cotton and increasing cotton production.
This invention made it more profitable to grow short staple cotton, which could be grown inland, and led to a significant increase in cotton production in the United States. So, the correct answer is option b.