Answer:
D. Dictator Josep Tito was a very powerful leader.
Step-by-step explanation:
Josip Broz Tito served as a President of Yugoslavia from January 14, 1953 till his death on May 4, 1980. He was the Father of Communism.
The Republics of Yugoslavia was unified under Mashall Tito because he was a very powerful leader. He, with his unquestioned leadership kept Yugoslavia unified till his death. He wisely led his partisans during the World War II and drove the Nazis out in the War. He is also praised for his way of balancing the Republics of Yugoslavia during the Cold War.
Under Tito's Presidentship, total six nations and other national minorities were unified.
Therefore, the correct answer is option D.