What type of laws can change due to shifting customs?

The correct choice pertains to common laws, which are characterized by their evolution based on societal norms, traditions, and customs. Unlike statutory laws, which are enacted by legislative bodies and remain fixed unless formally amended, common laws are built on court decisions and interpretations over time. As societal attitudes and customs shift, courts may adjust their interpretations and rulings, thereby altering the body of common law.

For instance, changes in public opinion regarding issues like marriage, contracts, or liability may lead courts to interpret existing common law principles differently, reflecting contemporary views. This adaptability allows common law to stay relevant and in line with current societal values and practices, which is not the case for the other types of laws mentioned. Regulatory laws and statutory laws are more rigid, whereas criminal laws are generally enacted and defined strictly by legislation, making them less susceptible to change from evolving customs.