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 aims to promote international financial stability and cooperation to prevent financial crises. It is not mainly about providing trade - rules, giving aid to developing countries, or loan - giving.

Answer:

C. cooperate to prevent financial crises.