The Mongol Empire had a devastating affect on Persia or modern day Iran. Today, Genghis Khan, the leader of the Mongol horde, is known as a genocidal warlord which killed millions of people there. A similar thing happened when the Mongols first invaded Russia as they slaughtered entire cities during their invasions; an example being the city of Kiev.
The correct answer is of course 3. They had very complex societies.
The first one probably.
I'm learning this in 6th grade btw.
The zhou dynasty was the longest does this help