Zones of Exchange and Communication in Sub-Saharan Africa and in the Americas

Zones of exchange and communication in sub-Saharan Africa and in the Americas

A) helped to create lasting states and many new innovations.
B) were similar to those in Eurasia, but smaller and more fragile.
C) were nothing like those in Eurasia and created no significant civilizations.
D) were unique and created states with no connections to those in Eurasia.