Adam Smith was known as the "Father of Economics". His ideas regarding the free markets inspired the economic thinkers.
<h3>Who was Adam Smith?</h3>
Adam Smith was a Scottish economist and philosopher who was known for his work An Inquiry into the Nature and Causes of the Wealth of Nations (1776).
He was known as the "Father of Economics" because he has given the theories on capitalism, free markets, and supply and demand.
Therefore the correct option is D.
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