Answer:
The correct answer is A. Confederalism is not a principle that is part of the Constitution.
Explanation:
A confederation is a permanent union of two or more states. Members are jointly responsible for governmental matters, but withhold extensive autonomy and often formal independence. Usually, the basis of alliances is the strengthening of security, which means more cooperation than a military alliance, but not as much cooperation as the establishment of a federation would require.
The Constitution of the United States does not adopt the confederation as a form of political organization in the country, but rather adopts the principle of federalism: a federal government is created, which holds sovereignty, while state governments are autonomous but not sovereign. Prior to the sanction of the Constitution, during the validity of the Articles of Confederation, a confederal system did exist in America.