(A) ** Britain, France, Russia, and the U.S.
(B) Germany and Austria-Hungary
(C) the Ottoman Empire and Russia
(D) France, Spain, and Britain
EXPLANATIONS BELOW
Concept note-1: -World War II the chief Allied powers were Great Britain, France (except during the German occupation, 1940–44), the Soviet Union (after its entry in June 1941), the United States (after its entry on December 8, 1941), and China.
Concept note-2: -In World War II, the three great Allied powers-Great Britain, the United States, and the Soviet Union-formed a Grand Alliance that was the key to victory.
Concept note-3: -The main Allied powers were Great Britain, The United States, China, and the Soviet Union.
Concept note-4: -…Germany and Austria-Hungary, and the Allies, composed of France, Russia, and Great Britain. This bipolar system had a destabilizing effect, since conflict between any two members of opposing blocs carried the threat of general war.