Answer:
C. a significant reduction in the inflation rate between 1979 and 1989, under the leadership of Fed Chairman Paul Volcker.
C. rose from 6% to 10% during the period of the Volcker disinflation.
Step-by-step explanation:
The "Volcker disinflation" was a significant reduction in the inflation rate between 1979 and 1989, under the leadership of the 12th Fed Chairman, Paul Volcker.
The unemployment rate rose from 6% to 10% during the period of the Volcker disinflation because he raised the federal funds rate from 11.2% in 1979 to 20% in June of 1981.