When people in a market economy specialize what do they depend on to make sure their needs are addressed

Que actos del pueblo simbolizaron el inicio de la revolucion y la caida de la monarquia?

In the kingdom of saudi arabia the government controls every aspect of oil production which makes up the majority of the country's economy. while other businesses are owned by individuals, the biggest segment of saudi arabia's economy is oil production. saudi arabia's economy would best be described as a) entirely market. b) almost entirely command. c) a mixture between just market and traditional. d) a mixed economy with large amounts of command.

What was discussed at the yalta conference