Final answer:
Administrative (option b) law is the branch of public law that protects business owners during interactions with the government.
Step-by-step explanation:
The law that protects business owners during interactions with the government in the context of regulatory laws and regulations is administrative law.
Administrative law is a branch of public law that deals with the creation, operation, and regulation of government agencies. It sets out the rules and procedures that these agencies must follow when making decisions or taking action that affects businesses and individuals. This body of law aims to ensure fairness, accountability, and transparency in the interactions between the government and those it regulates.