(A) Germany
(B) Austria-Hungary
(C) ** Japan
(D) Italy
EXPLANATIONS BELOW
Concept note-1: -Italy backs out of Triple Alliance.
Concept note-2: -The term “Allies” became more widely used than “Entente", although France, Britain, Russia, and Italy were also referred to as the Quadruple Entente and, together with Japan, as the Quintuple Entente.
Concept note-3: -Triple Alliance, secret agreement between Germany, Austria-Hungary, and Italy formed in May 1882 and renewed periodically until World War I. Germany and Austria-Hungary had been closely allied since 1879.