Final answer:
The United States did not support Haitian independence primarily due to the fear of slave rebellions that it might inspire among American slaves.
Step-by-step explanation:
One of the primary reasons why the United States did not support Haitian independence was b) Fear of slave rebellions. Following the success of the Haitian Revolution, there was widespread fear among American elites that this could inspire similar uprisings among enslaved people in the American South. Given that the economy of the southern United States was heavily reliant on slave labor, the notion of slaves rebelling and potentially achieving independence was terrifying to them. Additionally, the emergence of radical ideas from the French Revolution, combined with the influx of French migrants, including white refugee planters and people of color, fueled concerns about the spread of revolutionary sentiment within the United States, particularly among slaveholders.