Why did the gold–salt trade have an enormous impact on the cultures of West Africa? It created a network of trade routes connecting East Africa and West Africa.
By connecting West Africa to the rest of the world, it brought West Africans new goods and ideas.
By connecting West Africa to Europe, it allowed West Africans to conquer Mediterranean lands.
It established roadways that made travel between West Africa and North Africa faster.

explanation:

may i ask what challenges?

the old way of life was represented by superstition, an angry god, and absolute submission to authority. the thinkers of the age of reason ushered in a new way of thinking. this new way championed the accomplishments of humankind. individuals did not have to accept despair. science and reason could bring happiness and progress. kings did not rule by divine right. they had an obligation to their subjects. europeans pondered the implications for nearly a century. americans put them into practice first.

the correct answer is d