The triangular trade is a trade of slaves and resources between England, The Colonies, and Africa.
As far as I am concerned Gao was not one of the Songhay Empire's major ones but I bet two answers should be acceptable in this question. I also think that you can include the third option from the scale represented above because <span>Algiers were quite far away on north so they couldn't be the part of the Songhay. </span>
The United States and the Japanese.
Your answer is C. <span> ''Tax cuts will stimulate the economy, eventually bringing in more tax revenue.''</span>