Taxation without representation. It is mostly commonly shown as the Boston Tea Party, where they were complaining about the tea tax.
Answer:
d) To get approval for new taxes on the Third Estate
Explanation:
As the King Louis XVI had the power of approving any decision only if it was passed by a Majority "Estate Vote" in the "Estates General" by the Three Estates.
Also, as in 1789, France's economy was in a financial downfall, he was obliged to tax the Third Estate.