Which of the following statements best characterizes a basic difference between market economies and centrally planned economies?

a. Society relies more upon prices to allocate resources when the economy is centrally-planned than when it is market-based.
b. The self-interest of households is reflected more fully in the outcome of a centrally-planned economy than in the outcome of a market economy.
c. Government plays a larger role in the economic affairs of a market economy than in the economic affairs of a centrally planned economy.
d. None of the above are correct.

d