Answer:
The correct answer is the option C: For markets to work, people must be free to pursue their self-interest.
Explanation:
To begin with, Adam Smith was a Scottish economist, philosopher and author known as ''The Father os Economics'' and whose works established the basics of today's economics.
To continue, in Smith's most known classic work, ''An Inquiry into the Nature and Causes of the Wealth of Nations'', he established the concept called the ''invisible hand'' that states that in order to the economy to work properly, the people must be free to pursue their self-interest products without no restrictions from the government.