Answer:
A.earned by producers
Step-by-step explanation:
The market value of goods and services traded in an economy is also called market price. Market price is the value at which goods are traded between consumers and producers. Thus, the market value (price) paid by consumers is the same as the amount received by producers. For example, if a transaction occurs where a consumer spends $ 100 to buy a book, the producer will receive an income of $ 100 for offering the book, which is the market value, which is identical to both.