The statement, a good's market price communicates important information to decision makers in the economy, is true.
In the market, the consumer-buyers and producer-sellers make their own independent decisions and they are referred as decision makers, but market prices coordinate their choices and influences their actions. Thus, here the equilibrium is a state in which the conflicting forces of demand and supply are in balance.
Prices indicates information and provide incentives to buyers and sellers. So in the market, high prices are signals to producers to produce more and buyers to buy less. Low prices are signals for producers to produce less and for buyers to buy more.
Hence, option A is correct.
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