A historian is studying how Louisiana’s economy was affected by Hurricane Katrina. Which question is an effective research question? How can hurricanes and other types of severe weather be prevented? How can local governments protect residents from hurricanes? How did Hurricane Katrina influence Louisiana’s economy? What are some examples of the causes of severe weather?

Two of these describe "federalism." (choose two answers) select one or more: a. the national government absolutely controls all state governments. b. power is shared by the national and state governments. c. state governments exercise absolute power over the national government. d. it is a compromise meant to eliminate the disadvantages of a "unitary" and a "confederate" system.