B seems like the best choice.
The framers of the United States Constitution based our federal government on federalism. ... Federalism has evolved over the course of American history. Some important events have shaped the balance between the national and state governments so that federalism best suits the needs of the country at that time.
i think is a - the cause of all suffering is desire. because The Second Noble Truth says that Desire and attachment are the causes of unsatisfactoriness and suffering.
The answer is referendum. Usually this is a vote that comes from the people themselves. The result mostly leads to changes in laws. The fact that so many referendums have held in several countries from past to present shows how important it is that people take part in such developments.
