Self-interest and competition, in accordance with Adam Smith, function as invisible hands that direct businesses in a market-based economy.
Self-interest is commonly defined as a focus on one's own needs or interests. Self-interested behaviors are typically carried out unknowingly most of the time. Numerous philosophical, psychological, and economic theories look at how self-interest influences how people behave.
Since the business owner depends on customers to succeed, acting in their best interest will inevitably lead to the best deals for the consumer.
Thus, the correct option is 3.
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