Identify each cause of the following of the french revolution as social political or economic

I think that the causes of the French Revolution are the following:

1) ECONOMIC cause is the unequal tax burden between the estates 

2) SOCIAL cause is the division of French citizens into three estates

3) POLITICAL cause is the unequal representation of the third estate in the Estates-General

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necessary and proper clause. the congress shall have power to all laws which shall be necessary and proper for carrying into execution the foregoing powers, and all other powers vested by this constitution in the government of the united states, or in any department or officer thereof.