It shows that the war resulted in a new illusion of omnipotence."In April 1917 the illusion of isolation was destroyed, America came to the end of innocence, and of the exuberant freedom of bachelor independence. That the responsibilities of world power have not made us happier is no surprise. To help ourselves manage them, we have replaced the illusion of isolation with a new illusion of omnipotence" Barbara Tuchman
D. None of the above, because it is a strong example of a multi-nation state.
They attacked enemy ships, passenger ships, and trade ships. Basically any ship they saw, they attacked it.
Both used extreme nationalism to win support and both began programs of aggressive expression