Which type of government system has a central authority that holds all or nearly all of the power? a) an oligopoly b) a confederation c) a local government d) a unitary government

Unitary government

The Unitary government is a method of administrative arrangement with a primary supreme government which operates the jurisdiction and presents the conclusions for subordinate local authorities. An illustration of a unitary form of government in the United Kingdom superintending England. A substantial majority of the world's countries which is 165 of the 193 UN member republics become a unitary system of government.

can you tell me where are the ansawer choices