The Word 'Ethic' Has Its Roots in Ancient Greek with the Original

The word 'ethic' has its roots in ancient Greek with the original meaning of the word ethikos being linked to habit or custom. How do we know whether we act in accordance with our internal ethical compass?

A) To help us answer the question: 'What is the best way to live my life?' with questions such as 'should I eat an extra biscuit as this might make me fat?'
B) To show us to have weak principals or by attempting to look like Mother Theresa or Nelson Mandela.
C) To combine a number of ethical judgements into a broad 'system' to generate a framework for ourselves so that we may conduct ourselves well.
D) To allow us to debate the full philosophical dimensions associated with the world of ethics into how the use of ethics has transmuted into the world of leadership.