Final answer:
The Third Estate was the only class required to pay taxes in pre-revolution France.
Step-by-step explanation:
One of the major reasons for pre-revolution discontent in France was the Estate System and the requirements to pay taxes. The Third Estate was the only class required to pay taxes. The First Estate, which consisted of clergy members, and the Second Estate, which consisted of nobility, were exempt from paying taxes.
Learn more about estate system and taxes in pre-revolution France