An economy where the government sets prices, determines what and how many items will be produced, and assigns jobs to all citizens is called a economy.
a. command
b. traditional
c. barter
d. market

The correct answer is: "command economy".

In a command economy the state, and not the markets operating freely, determines the quantities produced of goods and services, their market prices and the assignment of factors of production to the different industries (land, labor, capital) and sometimes, even an assignment of the quantity of final products directed to each economic agent.

This economic system is a main feature of any communist regime, as for example the former URSS.

Traditional economies are agricultural and subsistence economies, with almost no trade of products. In market economies, the market determines production, prices and resources employed. Barter is a form of trade where money is not used and some item is exchanged for another product.

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