Option D: Post-Conventional
Melinda's aspiration to join the Peace Corps with the goal of promoting an end to discrimination against women suggests that she is likely aspiring to a post-conventional level of moral reasoning.
In Lawrence Kohlberg's theory of moral development, post-conventional moral reasoning is the highest level. At this stage, individuals base their moral judgments on abstract principles of justice, equality, and individual rights, rather than on external authority or social norms. They are willing to challenge and potentially violate laws or rules if they believe they conflict with higher moral principles.
Melinda's desire to address a significant societal issue, discrimination against women, reflects a commitment to broader ethical principles that go beyond conventional societal norms or personal gain, aligning with the characteristics of post-conventional moral reasoning.