What is the set of moral values that a society holds collectively referred to as?

The correct choice is the term "Ethics," which refers to the collective set of moral values that a society or group holds. Ethics encompasses the principles that guide behavior and decision-making within that society, reflecting what is considered right or wrong, acceptable or unacceptable. This term is typically used in discussions about moral behavior within a larger context, such as the ethical standards of a profession or a culture's values.

The other terms, while related, do not specifically capture the collective aspect of moral values. "Morality" tends to refer more broadly to individual beliefs about right and wrong rather than the agreed-upon standards of a group. "Principles" are fundamental truths or propositions that form the basis of a system of belief or behavior but may not encompass the entire framework of societal values. "Standards" generally refer to established norms or criteria used for comparison and may exist independently from the moral values that underpin them. Thus, the term "Ethics" is the most appropriate for describing the collective moral framework of a society.