(A) the Middle East
(B) ** The Balkans
(C) The Americas
(D) Europe
EXPLANATIONS BELOW
Concept note-1: -Four Balkan states defeated the Ottoman Empire in the first war; one of the four, Bulgaria, suffered defeat in the second war. The tensions and conflicts in this are often referred to as the “Balkan powder keg ” and had implications beyond the region.
Concept note-2: -As a result, the Balkans were known as the “powder keg” of Europe. A powder keg is a container for gunpowder which can erupt if there is a spark. Political cartoon published before WWI.
Concept note-3: -The powder keg of Europe or Balkan powder keg was the Balkans in the early part of the 20th century preceding World War I.