The right of people to receive the value of their output as determined

The right of people to receive the value of their output as determined by the market _____.

a. leads to people pursuing their own selfish ends, with little regard for others
b. leads individuals to produce only goods that will appeal to the masses
c. provides strong incentives to produce goods that will make themselves happy
d. provides incentive to produce goods that others find valuable

ANSWER

d