Which of the following is a characteristic of unitary systems like the United Kingdom? Eupranational organizations dictate policymaking priorities. Local governments do not exist in unitery systems. Local governments share equal pollcymaking power with the national government. Regions maintain autonomy over national disfonse and toxation. The central government concentrates power, enabiling more officient policymaking.

The correct answer is:<br /><br />**The central government concentrates power, enabling more efficient policymaking.**<br /><br />### Explanation:<br />In a **unitary system**, the central government holds the majority of political power and authority. While local governments may exist, they derive their powers from the central government and can be reorganized or abolished by it. This concentration of power allows for more streamlined and efficient policymaking at the national level, as there are fewer layers of government involved in decision-making compared to federal systems.<br /><br />Other options are incorrect because:<br />- **Supranational organizations dictate policymaking priorities**: This is not specific to unitary systems; it depends on international agreements or memberships (e.g., the European Union).<br />- **Local governments do not exist in unitary systems**: Local governments often exist but operate under the authority of the central government.<br />- **Local governments share equal policymaking power with the national government**: This describes a federal system, not a unitary one.<br />- **Regions maintain autonomy over national defense and taxation**: In a unitary system, regions typically do not have such autonomy; these powers are centralized.