Which type of law primarily deals with disputes between private parties?

The question pertains to the area of law that primarily focuses on disputes between private parties. Common law is the correct choice because it is a body of law developed by judges through court decisions, as opposed to statutes or regulations. Common law encompasses a wide variety of issues, including contracts, torts, property disputes, and family law, which are all examples of disputes typically arising between private individuals or entities.

In contrast, criminal law focuses on offenses against the state or public and involves governmental prosecution of individuals or organizations for violations classified as crimes. International law governs the relationships between nations and deals with issues such as treaties, trade, and international human rights, rather than private disputes. Administrative law regulates the activities of governmental agencies and is concerned with the rules and regulations that these agencies create. Thus, while each type of law has its specific realm, common law is the foundation for resolving private disputes, making it the most suitable answer.