The american government is a federal system. this means that:
a. the legislative branch consists of an upper and a lower house.
b. the federal government is divided into three branches.
c. citizens elect representatives to vote rather than voting directly.
d. powers are shared between state and federal governments.

The correct answer is D.

Federalism is a sort of goverment which combines a supreme central goverment and several regional subgoverments which are subordinated to the first one. In the US, on one hand, there is the federal US goverment, and under its supreme authority, there are also goverments at the state level. The US Constitution describes which are the powers reserved to each goverment level.

a is the final ! : )

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