The correct answer is A. The invention of the cotton gin.
Explanation
A cotton gin is a machine created during the late 18th century that has the utility of separating cotton fibers from their seeds and other objects attached to it quickly and easily. The invention of this machine contributed to the strengthening of slavery because it allowed the landowners of the south to start the domestic production of cotton cheaply and easily. However, once the export demand for cotton grew in the north and other countries, the landowners of the south acquired more slaves to supply that demand for cotton. This deepened slavery because none of the southern landowners wanted to set free the African-Americans who were bringing them huge profits from their work. So the correct answer is A.
After seizing political power in France in a 1799 coup d'état, he crowned himself emperor in 1804. Shrewd, ambitious and a skilled military strategist, Napoleon successfully waged war against various coalitions of European nations and expanded his empire.
<span>Britain led the world's Industrial Revolution with its early commitment to coal mining, steam power, textile, mills, machinery, railways, and shipbuilding. Britain's demand for iron and steel, combined with ample capital and energetic entrepreneurs, made it the world's leader in the first half of 19th century.</span><span>
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As the US expanded, there needed to be a balance of power between the north and south, which led to the Missouri compromise.
The correct option is slavery
The constitution of Texas made the institution of slavery legal. It prohibited slave owners from freeing their slaves until they obtained the consent of Congress. It also forbade congress from legislating against slavery such as by banning slave trade
