What are you thoughts regarding cultural diversity or self interest, philosophy homework help

1. A husband and wife are walking across a railroad track. She stumbles, and her foot gets caught in the switching mechanism. He tries to free her. Then a trail comes  roaring around the corner. Realizing he cannot free her before the train reaches them, the man leaps to safety. She is struck and killed instantly.

What are you thoughts regarding cultural diversity or self interest with respect to the case you chose? Consider the fact that ethics is the normative study of morals. Its job is to examine and formulate standards of the good and right that are justifiable and shareable. Ethical standards apply equally to all individuals, no matter what community they belong to. Is the ethical stance compatible with egoism or cultural relativism? 

Must be in your own words and will be ran through several plagiarism checkers.