Answer: I dont have enough evidence of what locations but the answers might be boundaries of countries and grasslands for grazing animals but i might be wrong.
Explanation:
An important scientist at the time, besides, those who were mentioned was Copernicus - A.
Spartacus was just a slave general in the Roman republic.
Rousseau was a philosopher.
Plato was a philosopher as well.
The correct answer for that reason is Copernicus, he was an astronomer and a major figure at the time.
I think it is Earthquakes
