The correct answer is "Fidel Castro was an authoritative leader who maintained control in Cuba."
Fidel Castro managed to remain in power since he ousted dictator Fulgencio Batista in 1959 until he transferred the presidency to his brother Raul Castro in 2016. This extensive period was due to prolonged support from the Soviet Union, from the start of his regime until the dissolution of this regime in 1991. By that time, Castro had already managed to make his regime a powerful institution in the country. He became permanent president and suppressed any form of political opposition in the country. All of his political adversaries were forced to exile.