Which of the following best summarizes a basic difference between market economies and centrally- planned economies? a. a market economy has a "more equal" distribution of resources than a centrally-planned economy. b. self-interest and prices serve to allocate resources in a market economy while a central planner typically attempts to allocate resources in a centrally-planned economy. c. centrally-planned economies rely more on self-interest and prices to allocate resources than market-based economies. d. the government plays a larger role in a market economy than in a centrally-planned economy.