(A) ** Pan Slavism
(B) the Black HandThe Black Hand
(C) Communism
(D) Schlieffenism
EXPLANATIONS BELOW
Concept note-1: -Pan-Slavism, 19th-century movement that recognized a common ethnic background among the various Slav peoples of eastern and east central Europe and sought to unite those peoples for the achievement of common cultural and political goals.
Concept note-2: -Pan-Slavism, a movement which crystallized in the mid-19th century, is the political ideology concerned with the advancement of integrity and unity for the Slavic people. Its main impact occurred in the Balkans, where non-Slavic empires had ruled the South Slavs for centuries.
Concept note-3: -Pan-Slavism, which was first mentioned as a term in 1826 by the Slovak philologist Ján Herkel (1786–1853) to establish the kinship of the Slavic languages, first appeared as a cultural movement of Czech and Slovak scholars.
Concept note-4: -In the first decades of the 19th century, the rapid development of German nationalism triggered the emergence of modern Panslavism. Many Slav-speaking intellectuals argued that all the Slav speakers belonged to a single nation.