Which of the Following Tends to Make a Country's Political

Which of the following tends to make a country's political institutions more effective in promoting economic freedom?

A) checks on the powers of the executive and legislative branches of government
B) constitutional protections for economic rights such as private ownership of property,freedom to trade,and freedom to hold alternative currencies
C) political decentralization so citizens can more easily escape from bad governments
D) All of the above tend to promote political institutions that promote economic freedom.