Which instrument is between many nations?

• A. Bilateral treaty
• B. Multilateral treaty
• C. Declaration
• D. Domestic law

Answer: (B)

In international law, instruments that bind multiple states are those designed to govern relationships among many countries. An instrument between many nations is a multilateral treaty. These involve more than two parties and create binding rules or obligations that apply to all signatories, often addressing global issues like trade, environment, or security. A bilateral treaty involves only two states, so its obligations are limited to those two parties. A declaration typically expresses political commitments or intent and is not usually legally binding. Domestic law governs affairs within a single country and doesn’t bind other nations. So, the option describing an agreement among many nations is a multilateral treaty.