Explanation:
what's the question you are asking
It would be the term "d. market economy" that refers to an economic system in which people earn wages and buy the goods and services they choose, since here the consumer is ultimately in charge of production.
During the high Middle Ages, the Roman Catholic Church became organized into an elaborate hierarchy with the pope as the head in western Europe. He establish supreme power. Many innovations took place in the creative arts during the high Middle Ages. Literacy was no longer merely requirement among the clergy.