Which example is a secondary source, history?
a. an interview with a depression-era farmer.
b. a 1999 report about the moon landing
c. a letter written to a confederate soldier
d. an artifact found buried beneath a barn

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.