Final answer:
Individuals who reason at stage 6 incorporate ethical reasoning based on universal principles.
Step-by-step explanation:
Individuals who reason at stage 6 incorporate ethical reasoning based on universal principles. This stage is part of Lawrence Kohlberg's theory of moral development, which posits that individuals progress through different levels and stages of moral reasoning as they mature. At stage 6, individuals develop a moral compass based on universal ethical principles, such as justice, equality, and human rights.