A. federalism
B. a confederation
C. a presidential system
D. a unitary government
Correct Answer:
Option D – a unitary government
Explanation
Centralization of power is the basic feature of a Unitary government.
Centralization is the process by which government power is located in a single central authority. The highest degree of centralization is realized where all powers of government are vested in a central authority. The degree of centralization is highest in a unitary state.