I think it is d but it also might be b but just go with d. it sounds more correct
Answer:
The Mongols were a nomadic people from the steppes of Central Asia. Known as fierce horsemen and warriors, the Mongol clans were united in 1206 by the powerful chief Temujin, later known as Genghis Khan.
A) a global holy war to destroy any and all non- Muslim peoples
The correct answer is Barcelona, which is the location of one branch of the Picasso Museum.