Answer:
The differences between formal and informal norms are how they are and what their punishments are. Formal norms are noted while informal norms are understood. An example of formal norm is, when breaking the norms the punishment is enforced through the government. An example of informal norm would be accepting a fashion style. The similarity between the two is that they are both elements of culture. They are also behaviors of norms.
I believe the answer is C.
Louis XVI´s decision to summon the estates-general prove disastrous because during it, the Third Estate , representing the Commoners decided to form a National Assembly, inviting the other two Estates ( Clergy and Nobility) to join them against the King. This is considered to be the start of the French Revolution.