(A) Findland
(B) Yugoslavia
(C) ** Romania
(D) Czechoslovakia
EXPLANATIONS BELOW
Concept note-1: -As a result of the war, Greater Romania-the expanded nation-state encompassing the majority of Romanians-came into being. Through the acquisition of Transylvania and the Banat from Hungary, Bukovina from Austria, and Bessarabia from Russia, the country’s territory was doubled.
Concept note-2: -On August 18, 1916, the Romanian government signed a secret treaty with the Allies; by its terms, in the event of an Allied victory Romania would acquire Transylvania, up to the River Theiss, the province of Bukovina to the River Pruth, and the entire Banat region, all territory under Austro-Hungarian control.
Concept note-3: -After World War I, five new nation states were formed on the western fringes of the disintegrating Russian Empire: Finland, Estonia, Latvia, Lithuania, and Poland.
Concept note-4: -The Kingdom of Romania was neutral for the first two years of World War I, entering on the side of the Allied powers from 27 August 1916 until Central Power occupation led to the Treaty of Bucharest in May 1918, before reentering the war on 10 November 1918.