Final answer:
Mark may have been inspired to start a restaurant based on Adam Smith's idea of self-interest, as it emphasizes that individuals working for their own benefit can produce positive results for society. This aligns with the entrepreneurial motivation behind opening a business.
Step-by-step explanation:
The concept by Adam Smith that likely inspired Mark to think of starting a restaurant is self-interest. In Adam Smith's seminal work, The Wealth of Nations, he posits that self-interested behavior in the marketplace leads individuals to make decisions that, although intended for personal benefit, can result in positive outcomes for society as a whole. This is because in pursuing their own profit, individuals inadvertently produce and provide goods and services that society needs. Consequently, when Mark considers opening a restaurant, he is likely recognizing his desire to fulfill his own self-interests, which include making a profit and potentially finding personal satisfaction in providing a service to consumers. While the invisible hand, competition, and laissez-faire principles are also fundamental Smith’s ideas and beneficial to the functioning of the market, it's the entrepreneurial spirit driven by self-interest that most directly relates to Mark's ambition of starting a business.