Adam smith provided a philosophy for this type of economic system.. a. communist . b. mixed-market . c. socialist. d. free market .

The answer is free market. In free market, the government has little control over the market economy. The market economy is based on supply and demand. Adam Smith is often referred to as the first free market capitalist. He also authored "The Wealth of Nations" which is considered as the bible of capitalism.

Ithink answer might be a.