Matthew Refused to Illegally Download a New Video Game Even

Matthew refused to illegally download a new video game even though all his other friends were downloading and playing it. He told his friends that they should not download games illegally as their parents would get mad at them if they find out. In the context of Kohlberg's stages of moral development, Matthew is at the _____ of moral development in this scenario.

A) punishment and obedience stage
B) law and order stage
C) instrumental exchange stage
D) "good boy, nice girl" stage