The conflict in Argentina known as the Dirty War occurred in the 1970s and 1980s. The resulting military dictatorship was known as the "Process of National Reorganization," or "Proceso."
What is dirty war?
The infamous campaign waged by Argentina's military dictatorship against suspected left-wing political opponents from 1976 to 1983 is known as the Dirty War.
Between 10,000 and 30,000 people were slain, while many more were "disappeared," kidnapped by officials and never seen or heard from again.
Thus, option D, 1970s and 1980s is correct.
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