The Quadis were early Germanic people that lived during the time of the Roman Empire. They invaded the Danube region from 166-180 A.D.
Someone who watches over and spectates the thing or event going on kinda like a supervisor.
Most came with their own money and training
The time frame is slightly important. Though for the most part that is false. The Chinese leaders did not see the need to interact with outside societies as they had little reason to trade.
b. False
B) Kelper: planetary orbits
Kelper had a similar theory of Copernicus