Which has contributed to a reduction of income inequality in Argentina Bolivia and Peru A a decrease in trade with other countries B an increase of people with university degrees C switch from command economies to mixed economies D move from dictatorship to Presidential republics

The factor that has contributed to a reduction of income inequality in Argentina, Bolivia, and Peru is **D) move from dictatorship to Presidential republics**.

The transition to more democratic forms of governance, such as presidential republics, has often led to more inclusive policies aimed at reducing inequality and promoting social welfare, contributing to a more equitable distribution of income in these countries. While other factors might also play a role, the shift towards democracy has had significant impacts on social policies and economic opportunities for underrepresented groups in these nations.