Final answer:
The Marine Corps code of ethics is expressed as Honor, Courage, Commitment. It aligns with Ross's prima facie duties that emphasize moral commitments and professional conduct.
Step-by-step explanation:
The Marine Corps code of ethics can be summed up as Honor, Courage, Commitment. This code closely relates to the philosophical views of W.D. Ross who identified five prima facie duties, which are: a duty of fidelity (to keep promises and be truthful), a duty of reparation (to make up for wrongs done), a duty of gratitude, a duty to promote a maximum of aggregate good, and a duty of non-maleficence (to not harm others). The Marine Corps values embody principles that aim to guide Marines to act ethically both in military and personal life, to ensure they maintain the highest standards of morality and professional conduct.