Adam Smith in his The Wealth of Nations stated, "By pursuing his own interest he frequently promotes that of the society more effectually than when he really intended to promote it." What behavior does this notion attempt to justify

The correct answer is : A. Competitiveness

Explanation:

This behavior encourages to keep people motivated by causing you to do more self-reflection and making you develop new beliefs. When comparing themselves to others the self-worth is measured.  This factor makes people work very hard.  They have the inner drive to do much better.

i honestly speaking this is too long

i would say b. research typically uses a variety of sources