The existence of the African civilizations of Ghana, Mali, and Songhai shows that: A) African societies did not interact with one another.

B) the African Continent was united prior to contact with Europeans.

C) advanced civilizations developed in Africa prior to contact with Europeans.

D) All of the choices are correct.

east-west schism. the greatest effect of the east-west schism was the creation of two separate churches that had previously been unified under one church, the eastern orthodox church and the roman catholic church.

in the 1950s, country music came into its own before rock-n-roll took off in the 60s while jazz and classical music continued to innovate