The Maya and the Olmecs are Mesoamerican civilizations that were not known to Europe and Africa before Columbus. Han dynasty ruled ich China- so it's not a good option either.
The correct answer is the Kingom of Axum, in today's Ethiopia, which had trade relations with the Roman Empire.
Despite what many of the other Brainly answers say to this question, the CORRECT answer is A. the massacre of Jewish people in the pogroms. Just took the test and got it all right.