The best distinction of the key causes of the American, French, and Haitian Revolutions is:
The American colonists wanted to control their own government; the French people wanted control of their own government; the Haitian people wanted freedom from slavery.
This option accurately captures the essence of each revolution: the American Revolution was primarily about self-governance and independence from British rule, the French Revolution was about overthrowing the monarchy to gain political rights and representation, and the Haitian Revolution focused on the abolition of slavery and the quest for freedom.