challenge: During which years did Estudiantes de Río Cuarto qualify to play the Campeonato Nacional at the highest level of Argentine football?
  
  A. 1981, 1982, 1983
  B. 1983, 1984, 1985
  C. 1982, 1983, 1984
  D. 1984, 1985, 1986
  Answer: 