What does the interval above indicate? (see the photo above)a. all integers except 0 are in the interval. b. all real numbers are in the interval. c. all integers are in the interval.

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.