What did Ghana and Mali contribute to the economic and cultural development of West Africa? PLEASE HELP AND HURRY

Caravan trade contributed MOST to the growth and power of the West African empires of Ghana and Mali. Control of gold-salt trade routes helped Ghana, Mali, and Songhai to become large and powerful West African kingdoms.

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-an amendment is proposed.

-two-thirds of congress must approve.

-thee-quarters of states must approve.

-the proposed amendment becomes law.

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