Which of the following was the most prominent cause of the American entry into the war? A. The use of unrestricted submarine warfare against American vessels such as the Lusitania.

B. The Zimmerman Telegram.
C. The desire to acquire European colonies.

D. Economic dependence of the United States on European powers.

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.