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:

in 1989, tiananmen square in beijing was the site of china’s main industries. china’s government headquarters. -pro-democracy demonstrations. (second choice)

the  wilmot proviso  was designed to eliminate  slavery  within the  landacquired as a result of the mexican war (1846-48). fearing the addition of a pro-slave territory, pennsylvania congressman david  wilmot proposedhis amendment to the bill.