What is one major difference between federal and unitary governments?

a: constitutions are more important to a unitary government

b: the central government is stronger in a unitary government

c: there is more separation of powers in a unitary government

d: state governments are more powerful in a unitary government

Are there any answer choices?

Protecting and assisting  u.s. citizens  living or traveling abroad; assisting u.s.  businesses  in the international marketplace; coordinating and providing support for international activities of other u.s. agencies (local, state, or federal government), official visits overseas and at home, and other diplomatic efforts.keeping the public informed about u.s. foreign policy and relations with other countries and providing feedback from the public to administration officials.providing  automobile registration  for non-diplomatic staff vehicles and the vehicles of diplomats of foreign countries having  diplomatic immunity  in the united states