What is the MAIN reason the author includes the
section "The U. S. And The German U-Boat
Campaign"?
A. to show how the war at sea affected Americans
before the United States joined the war
B. to describe the event that finally made the
United States decide to join World Warl and
fight against the Germans
C. to illustrate the unfaimess of war when civilians
are starved from blockades or killed during sea
attacks
D. to demonstrate how the Sussex pledge
protected passengers of ships when the U-
boats went on campaigns