What type of law governs offenses such as kidnapping or bank robbery?

The correct response is based on the fact that offenses like kidnapping when it crosses state lines and bank robbery are categorized as federal crimes. Federal law is applicable in situations where actions violate statutes enacted by the United States Congress. In cases of bank robbery, it is specifically marked as a federal offense due to its implications on interstate commerce and the use of federal banking institutions. Similarly, certain forms of kidnapping, especially those involving interstate or international aspects, fall under federal jurisdiction.

This design of federal law facilitates consistent enforcement across state lines, which is crucial in maintaining a coherent legal framework for crimes that can impact multiple states or have broader implications. While state law governs many crimes and civil law deals with disputes between private parties, the nature of offenses like kidnapping and bank robbery makes federal law the appropriate governing body in these scenarios. International law typically pertains to interactions and agreements between nations rather than specific criminal offenses within a country.