(A) Asia
(B) North America
(C) ** Europe
(D) Africa
EXPLANATIONS BELOW
Concept note-1: -Most of the combat in the First World War took place in Europe, along three fronts: 1) the Italian border with the Austro-Hungarian Empire and the Balkans in the south, 2) the Eastern Front along the Russian border in the east, and 3) the Western Front in France and Belgium.
Concept note-2: -It was fought between two coalitions, the Allies (primarily France, the United Kingdom, Russia, Italy, Japan and the United States) and the Central Powers (led by Germany, Austria-Hungary, and the Ottoman Empire). Fighting occurred throughout Europe, the Middle East, Africa, the Pacific, and parts of Asia.
Concept note-3: -The conflict was fought on three continents – Europe, mainly, but also Asia and Africa. It almost spread to a fourth continent, North America. One reason the United States finally joined the war – in 1917 – was because the British had intercepted a coded telegram sent by Germany to Mexico.
Concept note-4: -Britain and its Empire’s entry into the war made this a truly global conflict fought on a geographical scale never seen before. Fighting occurred not only on the Western Front, but in eastern and southeast Europe, Africa and the Middle East.