Milton Friedman said the free markets are a necessary but not sufficient conidtion for political freedom. Which of the following events would support Milton's hypothesis?

a. Chile after the overthrow of Allende adopted free market reforms. They were initially carried out by the dictator General Pinochet, but eventually a democratic government was elected.

b. Sweden's democratic socialism is very effective.

c. China has adopted market reforms but at the same time the government is still authoritarian.

d. both a and c are correct.