Whats the he correct answer

Which statement about federal and unitary systems is most accurate? O Today there are more countries with federal systems than with unitary systems. In a federal system, the constitution allocates powers between states and federal government; in a unitary system, powers are lodged in the national government. O The United States and Japan have federal systems, while Great Britain and Canada have unitary systems. In a federal system, power is concentrated in the states; in a unitary system, it is concentrated in the national government