All of the Following Statements Concerning a Federal System of Government

All of the following statements concerning a federal system of government are true EXCEPT

A) they always have a bicameral legislature.
B) they are divided between a central government and regional, or subdivisional, governments.
C) some powers are bestowed upon the central government, and others are granted to the regional governments.
D) power is not concentrated in a unicameral legislature within a strong central government.
E) power is exercised by the national government only insofar as these powers are granted by the states.