(A) Russia
(B) ** Germany
(C) France
(D) Britain
EXPLANATIONS BELOW
Concept note-1: -When World War I broke out in 1914, the Russian Empire had the world’s largest standing army, with approximately 1, 400, 000 soldiers on active duty.
Concept note-2: -Great Britain was near the height of its strength. It was the center of world finance, a top industrial nation, and it ruled over nearly a quarter of the world’s inhabitants.
Concept note-3: -There were two main power blocs in World War I: the Triple Entente of Britain, Russia, and France, as well as the Triple Alliance of Italy, Austria-Hungary, and Germany. Q: What country was the most powerful during World War I? Great Britain was the most powerful of all countries at the beginning of World War I.
Concept note-4: -The German Army in 1914 comprised 25 corps (700, 000 men). Within a week of mobilization some 3.8 million men were under arms. There were eight army commands and a further ten were created during the war.