Question

in a free - enterprise system, consumers decide
how to set prices.
which goods to export.
which services to buy.
how to use materials.

Explanation:

In a free - enterprise system, consumers have the choice of which services (and goods) to purchase. Producers or firms are more likely to decide how to set prices, which goods to export, and how to use materials. So the correct option is the one about which services to buy.

Answer:

C. which services to buy (assuming the options are labeled A, B, C, D in order, with A: how to set prices, B: which goods to export, C: which services to buy, D: how to use materials)