Which empire lasted only 100 years and which lasted almost 300 years?

Need answers to all questions for this paper

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.

What was a immediate cause of the panic of 1837