Which of the following defines international business law?

International business law encompasses the legal frameworks that govern transactions and relationships between businesses operating across national borders. This area of law includes a wide array of regulations, treaties, and conventions that address issues such as trade agreements, investment laws, intellectual property rights, and dispute resolution mechanisms. It is concerned with how international commercial transactions are conducted, the rights and obligations of parties involved, and how legal conflicts are resolved when parties are in different jurisdictions.

The other options, while related to aspects of international business, do not encapsulate the broader scope of international business law. For example, laws regulating employment of international workers focus specifically on labor relations and immigration, which are just one component of the larger framework. Trade tariffs are important for international trade but are only a part of the legal landscape, and environmental standards, although relevant to businesses, pertain specifically to environmental law rather than encompassing international business regulation as a whole. Thus, the defining characteristic of international business law is its comprehensive approach to regulating the myriad of interactions and transactions that occur in the global marketplace.