Answer: Post conventional
Explanation:
The post conventional is one of the type of moral development stage in the Kohlberg's theory that basically helps in defining the various types of values and the principle. It is basically define about the various types abstract principle and also the values in terms of morality.
According to the given question, Mr lamber's reasoning is best illustrating about the post conventional stage which basically concerned with the various types of ethical principles and the human rights.
Therefore, Post conventional is the correct answer.