Passage: "The recent re-evaluation of classical economic theory has led to a renewed interest in behavioral economics, which challenges the assumption of rational actors. Behavioral economists argue that psychological biases, cognitive heuristics, and social influences often lead individuals to make decisions that deviate from purely rational self-interest. For instance, the 'endowment effect' describes how people tend to value items more highly once they own them, even if their objective value has not changed. Similarly, 'framing effects' demonstrate how the presentation of information can alter choices, even when the underlying options are identical. While classical economics provides a powerful framework for understanding markets, behavioral insights offer a more nuanced understanding of human decision-making, particularly in areas like savings, investment, and public policy design." The author's discussion of the 'endowment effect' primarily serves to:

1. ASuggest that individuals are inherently irrational in their financial choices.
2. BIntroduce an alternative economic model that completely replaces classical economics.
3. CCritique the foundational principles of classical economic theory.
4. DProvide an example of how psychological biases influence economic decisions.