Identify the incorrect source of rules that regulate individual and business behavior.

The correct answer focuses on the nature of customs in the context of regulating individual and business behavior. While customs, which are established practices or traditional ways of doing things within a society, do have a significant influence on behavior, they are often not formally recognized as binding rules or regulations. Unlike the law, which is enforced by governmental authority, or ethics and non-legal rules that may have structured doctrines or guidelines, customs function more on a societal expectation basis rather than on enforceable legal requirements.

In contrast to laws, which are codified and applicable to all individuals and businesses, and ethics, which provide a framework for moral reasoning in decision-making, customs lack formal authority. Therefore, while customs can guide behavior and create informal norms within a community, they do not constitute a regulated source in the same way that laws and established ethical frameworks do.