Looking at economics, which of these helped Ghana, Mali, and Songhai empires in West Africa prosper the most?

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Explanation:

Control of gold-salt trade routes helped Ghana, Mali, and Songhai to become large and powerful West African kingdoms.

it provided for selection of government employees through competitive examinations. it also made it unlawful to fire or demote covered employees for political reasons or to require them to give political service or payment, and it set up a civil service commission to enforce the law.

explanation:

im not sure its either a leader of a group of congresspeople or a person from a congressmans district

sorry im not sure