The correct answer is A) It has a central government that exercises complete control over smaller units of government, like states.
The statement that best describes how a unitary government is different from the government of the United States is that the Unitary government has a central government that exercises complete control over smaller units of government, like states.
A unitary government is a political system that has a strong central government that has total control of politics and the economy. This central government decides what to do and who is going to do it. It exerts its control in the federation and in the states and local governments. An example of a modern unitary state could be Great Britain.
