(A) Russia, German Empire, France, Spain
(B) ** United States, France, Russia, Serbia, Britain
(C) Ottoman Empire, Bulgaria, Germany, Italy
(D) Spain, Italy, France, German Empire
EXPLANATIONS BELOW
Concept note-1: -The major Allied powers in World War I were Great Britain (and the British Empire), France, and the Russian Empire, formally linked by the Treaty of London of September 5, 1914.
Concept note-2: -During the conflict, Germany, Austria-Hungary, Bulgaria and the Ottoman Empire (the Central Powers) fought against Great Britain, France, Russia, Italy, Romania, Canada, Japan and the United States (the Allied Powers).
Concept note-3: -major reference 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. More generally, the Allies included all the wartime members of the United…
Concept note-4: -The war quickly involved countries not part of the Triple Entente, so the opposing side was known as the Allies: Serbia, Russia, France and its Empire, Belgium, Montenegro and Britain and its Empire, including self-governing colonies like Canada and Australia. Italy changed sides and joined the Allies in 1915.