Which of the following ethical concepts is based on the idea that no natural laws exist that must be followed absolutely?

The correct answer is situation ethics. This ethical concept posits that moral decisions should be made based on the context of a particular situation rather than following absolute moral laws or rules. Situation ethics emphasizes that what is considered "right" or "wrong" can vary depending on the specific circumstances involved, acknowledging the complexity and nuances that can arise in ethical decision-making. This approach allows individuals to prioritize compassion and the well-being of others above rigid adherence to predetermined laws, adapting their responses to the needs and outcomes of each unique situation.

In contrast, the other options present different perspectives on ethics. Credibility-centered ethics focuses on the trustworthiness of the speaker and the integrity of the message rather than the variability of moral principles. Ends and means refer to the relationship between the outcomes of actions and the methods used to achieve them, implying that the ends can justify the means in certain cases. Social utility is concerned with the greatest good for the greatest number, advocating for actions that maximize overall happiness or benefit to society, which still operates under a form of absolute reasoning.