The best response that distinguishes the key causes of the American, French, and Haitian Revolutions is:
The American colonists wanted to control their own government; the French people were starving with no relief from the king; the Haitian people wanted freedom from slavery.
This option accurately summarizes the main motivations behind each revolution: the American colonists sought self-governance, the French populace faced severe economic hardship and sought relief, and the Haitian people fought for liberation from slavery.