Peter Runs an Auto Air Conditioning Repair Shop

Peter runs an auto air conditioning repair shop.Because of the phase-out of the ozone-depleting refrigerants used in older auto air conditioners,auto air conditioning repairers have become subject to numerous new laws and regulations,some of which are costly and burdensome to comply with.Although it costs him more,Peter decides to follow all the statutes and regulations so long as everyone else does the same.Peter has reached his decision in accordance with:

A) ethical relativism.
B) utilitarianism.
C) ethical fundamentalism.
D) Kantian ethics.
E) Rawls's social justice theory.