The class conflict started the revolution, is the right answer.
Explanation:
According to the traditional interpretation, the French Revolution took place due to the class conflict. The society in France was divided into three popular estates known as the First, Second and the Third Estate. In this social structure, the people belonging to the first estate enjoyed political rights extensively and they were exempted from paying taxes. Though the Second estate also had political rights, they had to pay a very fewer taxes. Accordingly, the Third Estate had to pay all the taxes and they had no political and social equality or rights. This class conflict resulted at the beginning of the French Revolution.
