(A) ** Hungary
(B) ** Greece
(C) France
(D) ** Bulgaria
EXPLANATIONS BELOW
Concept note-1: -Bulgaria’s main allies are Greece and Romania, and it maintains good relations with Serbia and the rest of the Balkans.
Concept note-2: -Bulgaria (Bulgarian: ), officially the Republic of Bulgaria, a unitary state on the Balkan Peninsula in southeastern Europe bordering the Black Sea in east. The country shares international borders with Greece, the Republic of Macedonia, Romania, Serbia, and Turkey.
Concept note-3: -The World Bank classifies Bulgaria as an upper-middle income nation. Its economy is powered by construction, mining, services – which include tourism – and agriculture sectors. The global economic downturn ended a run of strong economic growth for the country.