Can someone answer this? Which African kingdoms rose to prominence through trade during the postclassical era?

Ghana, Mali, and Songhai were powerful kingdoms that ruled West Africa by dominating saltgold trade routes.

Explanation:

8 years 100% positive

explanation:

a phrase from a poem by ralph waldo emerson about the battle of lexington and concord. emerson's words read, “here once the embattled farmers stood / and fired the shot heard round the world.”