(A) ** April 1917
(B) July 1919
(C) August 1914
(D) May 1944
EXPLANATIONS BELOW
Concept note-1: -On April 6, 1917, the United States formally declared war against Germany and entered the conflict in Europe.
Concept note-2: -Germany’s resumption of submarine attacks on passenger and merchant ships in 1917 became the primary motivation behind Wilson’s decision to lead the United States into World War I.
Concept note-3: -And on April 6, 1917, the United States declared war on the German Empire, joining France, Great Britain, Russia, Canada, Australia, New Zealand, South Africa and Italy.
Concept note-4: -April 6, 1917: Two days after the U.S. Senate voted 82 to 6 to declare war against Germany, the U.S. House of Representatives endorses the declaration by a vote of 373 to 50, and America formally enters World War I.