A

In a unitary system of government, local offices have equal power with the central government.

Explanation:

There are three structures of government; they include the unitary, federal, and confederate ones.

The unitary system is determined by the fact that local offices have equal power with the central government, which means they are controlled by the central authority. This system is opposed to the federal one, in which local units have partial autonomy.

Decentralization can be considered one of the most significant peculiarities of unitary structures; you can find out more information about it here.

The map of unitary (blue) and federal systems (green) is presented below. The majority of nation states are unitary systems. The examples of unitary systems include the Philippines and England, while the United States is a federal government.

The map of unitary (blue) and federal systems (green).
Unitary and federal states (Source: https://en.wikipedia.org)