The correct answer is A. Invisible hand
Step-by-step explanation:
Adam Smith was a Scottish philosopher and economist mainly known as "The Father of Capitalism" due to his proposal related to economy and capitalism. Indeed in his books "The Theory of Moral Sentiments" published in 1759 and "An Inquiry into the Nature and Causes of the Wealth of Nations" published in 1776 Adam Smith explored multiple concepts including the concept of the "invisible hand", according to Smith the actions of individuals guided by self-interest in economy support the general interests of society especially by working as a force that balance the demand and supply of goods which means individuals indirectly help market and society operate. Considering this, it can be concluded the notion that people make economic choices that are best for themselves, but that self-inters leads them to do what is best for the society is the "invisible hand".