Final answer:
The organization most likely to get involved when a nation's laws prevent another from selling goods is the World Trade Organization (WTO), which works to regulate international trade norms and resolve trade disputes.
Step-by-step explanation:
If one nation's laws make it impossible for another nation to sell its goods there, the organization most likely to get involved would be the World Trade Organization (WTO). Member state governments depend on this organization to establish, revise, and enforce the rules that govern international trade. The WTO's role includes dealing with trade barriers that nations might put in place, which can take the form of tariffs, quotas, or outright prohibitions on certain goods and services.
The WTO aims to ensure that international trade flows as smoothly, predictably, and freely as possible. To accomplish this, it provides a forum for negotiating and a dispute resolution process aimed at enforcing participants' adherence to WTO agreements, which are signed by the majority of the world's trading nations and ratified in their parliaments.
Industry lobbying for tariffs or quotas on imports is a common practice where domestic businesses try to protect their interests. However, WTO agreements often limit the extent to which member nations can employ such protectionist measures. On the other hand, organizations like OPEC operate in a gray area of international law, and their actions to control prices and output of commodities like oil are not legally enforceable through standard judicial processes.