One of the significant long-term impacts of the trans-saharan gold and salt trade was a) the eventual depletion of gold in west african mines. b) the spread of islam to western african kingdoms such as songhai. c) the syncretic blend of christianity and african religions found in ghana. d) the large conflicts that arose between muslim merchants and african kingdoms.

B) the spread of Islam to western African kingdoms such as Songhai

Explanation:

The trans-Saharan gold and salt trade had large impact on the people living in West Africa. As this trade route was connecting the people on both sides of the Sahara desert, they were constantly exposed to new technology, culture, religion, ideas. One of the things that had a long lasting effect was the spreading of Islam. This religion came in West Africa from North Africa, through the gold and salt trade routes. The religion seemed appealing to some of the West African kingdoms, such as the largest of them all, the Songhai, so it was adopted. By adopting the Islam, the region started to gradually change, as the societies started to act in accordance to what the Koran was saying, thus having a long term impact on this part of Africa.

answer; i believe that the correct answer is (agriculture);

the effect of the ming leaders banning ships with more than two masts was that there was no further construction of ships masts, because there was a surplus. ming emperors disallowed foreign exploration