In 1917, Germany, determined to win its war of attrition against the Allies, announced the resumption of unrestricted warfare in war-zone waters. Three days later, the United States broke diplomatic relations with Germany, and just hours after that the American liner Housatonic was sunk by a German U-boat
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Economics is the study of the production and distribution of goods and services.
Answer:
(Containment policy) meant to contain the spread of Communism.