Why did the Islamic world suffer hardship during the 1200s and 1300s?

AMuslim tyrants kept their subjects in serfdom and poverty.
BWestern European kings sent armies to retake Jerusalem and capture as many Muslims as possible to use as slaves.
CMongol armies rode out of central Asia to invade and conquer first one part and then another part of the Muslim world.
DChristian soldiers of the Byzantine Empire forced Muslims under their control to accept Christianity or face death.

Verified Answer :

Neuron

c - Mongol armies rode out of central Asia to invade and conquer first one part and then another part of the Muslim world 

The area of today's Iran, for example, counts Genghis Khan as one of the most genocidal figures in its history as he was responsible for the deaths of vast amounts of peoples all around the Middle East and Iran specifically.

Answer:

c. Mongol armies rode out of central Asia to invade and conquer first one part and then another part of the Muslim world.

Explanation: