Answer:
C. 10
Explanation:
He came to power in 1959. The President's who were in office since he's been in control of Cuba are these in exact order. President # 34 Dwight David Eisenhower; years in office 1953-1961, President # 35 John (or Jack) Fitzgerald Kennedy; years in office 1961-1963, President # 36 Lyndon Baines Johnson; years in office 1963-1969, President # 37 Richard Milhous Nixon; years in office 1969-1974, President # 38 Gerald Rudolph Ford; years in office 1974-1977, President # 39 James (or Jimmy) Earl Carter, Jr.; years in office 1977-1981, President # 40 Ronald Wilson Reagan; years in office 1981-1989, President # 41 George Herbert Walker Bush, Sr.; years in office 1989-1993, President # 42 William (or Bill) Jefferson Clinton; years in office 1993-2001, President # 43 George Walker Bush Jr.; years in office 2001-2009. Those are all of them.