Which nation declared itself neutral but later entered the war in 1917?

a.
United States
b.
Germany
c.
Great Britain
d.
Serbia

Please select the best answer from the choices provided

A
B
C
D

Unites States

Explanation: "On January 22, 1917, President Woodrow Wilson told a joint session of Congress that the United States must remain neutral in World War I to ensure “peace without victory.” Eleven weeks later, he returned to Congress to request a declaration of war against Germany."- History Faceoff: Should the U.S. Have Entered World War I?

PS. The explanation is not my work but to the rightful owner, www.History.com

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