The constitution created a federal system in the united states. which of the following best describes a federal government?
equal and full sovereignty granted to all states with a weak central government
a parliament that grants limited power to each provincial government
an executive branch that has great, sweeping powers to direct a nation
power split and shared between the central and state governments
a unicameral national legislature that provides equal voting to each state

The correct answer is: "power split and shared between the central and state governments".

The US Constitution ennumerates the powers which are reserved to the federal and state goverments. After several landmark Supreme Court rulings, the necessary and proper clause was also included in the US Constitution, giving implied powers to the federal goverment that are not explicitly contained in the Constitution. It also describes the supremacy of the federal goverment over state goverments, that cannot easily interfere with the actions of the first.  

interest groups send representatives to state capitals and to washington, d.c. to put pressure on members of congress and other policymakers. they engage in lobbying, or the organized process of influencing legislation or policy. lobbying can take many forms. interest groups can testify in congressional hearings.