What word best describes Congress?

Why is it useful for historians to base certain studies on the analysis of historical periods

What is something current on the news happening? not anything about a fire

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.