some of the countries that use the federal system are...
United states
Mexico
Germany
Canada
Australia
and Brazil
The correct answer should be D. an urban unit with clear boundaries and a degree of autonomy
A has to be a town, even though the definitions of the two are almost the same. B is not it because a city can be an industrial center, not a cultural one. C is not it because natural geographic boundaries are not necessary.
Iran was ruled by a constitutional monarchy under Mohammad Reza Pahlavi, Iran's Shah (king).
He was commander in chief of the U.S armed forces
