Question

the main purpose of the g20 is to
provide rules for international trade.
offer help to developing countries.
cooperate to prevent financial crises.
give loans to struggling economies.

Explanation:

The G20 (Group of Twenty) is a forum of major economies. Its main focus is on global economic stability and cooperation. Providing rules for international trade is more the role of organizations like the WTO. Offering help to developing countries and giving loans to struggling economies are more associated with institutions like the World Bank or IMF. The G20's key aim includes collaborating to prevent financial crises through policy coordination and dialogue among member nations.

Answer:

C. cooperate to prevent financial crises.