Final answer:
Brent's method of analyzing his relationship with Vicky by comparing inputs versus outputs aligns with the social exchange theory, which focuses on a cost-benefit analysis in relationships. D. Social exchange.
Step-by-step explanation:
In trying to determine the seriousness of his relationship with Vicky, Brent is carefully analyzing what he is putting into the relationship versus what he is getting out of it. The theory of love that would best explain Brent's approach is D. social exchange. According to social exchange theory, individuals act like naive economists by keeping track of the ratio of costs and benefits when forming and maintaining relationships. This cost-benefit analysis aims to maximize the benefits of social interactions while minimizing the costs. Brent is essentially weighing the rewards against any potential drawbacks to assess the value and seriousness of his relationship with Vicky. Contrasting this with Sternberg's Triangular Theory of Love, which includes components of intimacy, passion, and commitment, Brent's method doesn't necessarily consider these aspects holistically. Instead, the social exchange theory evaluates relationships based on a more utilitarian perspective where the benefits should ideally outweigh the costs for it to be considered worthwhile. Brent's approach of carefully analyzing what he is putting into the relationship versus what he is getting out of it aligns with the principles of social exchange theory. Social exchange theory posits that individuals engage in social relationships based on a rational calculation of the rewards and costs involved. It involves assessing the benefits and drawbacks of a relationship and making decisions based on the perceived value of the outcomes. This theory emphasizes the idea that individuals seek relationships that offer them positive rewards and minimize potential costs.