Answer:
D. From ancient aliens.
Step-by-step explanation:
Question is not very much clear to me but according to my knowledge, Africa has the oldest records of human's achievement in the field of technology. For example, oldest stone tools were found in the eastern Africa where also the early tool-making industry evolved.
Three types of calendars lunar, solar and stellar were found in Africa. North Africa and Nile valley had imported the Iron technology from near East and followed the pattern to transform from Bronze age to Iron age. Africans were also the masters of bronze and brass and produced life like statutes.
Nubia was the source of gold and it developed as the source of wealth and power. Knowledge of against smallpox seemed to have been known to West Africans.