B. Enlightenment philosophies started the revolution.
Explanation:
The ideas spread by that movement attacked the previous concepts of classes and bring the idea that every human was equal. It stood against the theological ideas about God, the clergy and the monarchy. It questioned their authority over the rest of the people, if every human was equal then the only ones able to rule them would be those who the people elected.
Those ideas hit hard in the masses that comprise the Third Estate and made them questioned about those who ruled them. That is why the enlightenment philosophies triggered the class conflicts and started the French Revolution.
The traditional interpretation of why the French Revolution started is due to political conflicts between the classes. Other reasons include an ineffective leader and economic struggles.
