Which aspect is indicated to be the most relevant in the decision-making process according to Kohlberg's theory of moral development?

In Kohlberg's theory the most relevant aspect is how the child arrives at the conclusion, the reasoning behind the choice.

The age of the child is not what defines the moral stage.

Knowledge of law matters only at the law and order stage, not overall.

Influence of friends and siblings is not the decisive factor.

Kohlberg judged moral maturity by the justification, not the decision itself.

He used moral dilemmas like the Heinz dilemma to probe this reasoning.