Final answer:
International organizations, such as the WTO, play a key role in creating and enforcing rules for global trade to maintain economic prosperity and encourage globalization.
Step-by-step explanation:
The major role of international organizations in the global economy is B. Establishing rules for global trade. For example, the World Trade Organization (WTO) was created to maintain peace and economic prosperity by establishing rules that govern international trade. It provides a venue for trade negotiations and helps member states to encourage globalization, rather than to isolate local economies or promote protectionist policies. Member state governments rely on organizations like the WTO to establish, revise, and enforce the rules that help in restraining trade liberalization challenges by domestic special interests, ultimately aiding in the reduction of tariffs and other trade barriers.