(A) 1900-1909
(B) ** 1910-1919
(C) 1920-1929
(D) 1930-1939
EXPLANATIONS BELOW
Concept note-1: -Jennifer Rosenberg is a historian and writer who specializes in 20th-century history. World War I was sparked by the assassination of Archduke Franz Ferdinand in 1914 and ended with the Treaty of Versailles in 1919.
Concept note-2: -The Period from 1910 to 1920 saw the Progressive Era fade and give way to World War I and its aftermath. Changes that had been slowly building over the decades accelerated, some even finally blossoming to fruition.
Concept note-3: -World War I occurred between July 1914 and November 11, 1918. By the end of the war, over 17 million people would be killed including over 100, 000 American troops.
Concept note-4: -November 11, 1918 Germany signs the Armistice at Compiègne, ending World War I.