Answer- D
Explanation- Some of the first major city-states were port cities that acted as trade centers, like the republics of Pisa, Genoa, and Venice. Their wealth came from international trade routes we call the silk roads, connecting European and Asian markets thanks to the massive Mongol Empire that opened up Eurasian trade.
I know this really isn't an answer but I know Crash Course has a video on it on YouTube.
Yes they do influence us as we can gain information about whether the event was large or small such as the great fire of London , the word great emphasises the size of the fire and the great impact it had on the people and the surroundings - hope this helps !
