Well, one cause they had is coal. they used that for railroads and factories. but coal caused a lot of damage to the environment at that time. hopefully this is correct. good luck.
The answer is C. (9x+4)(9x+4)
Sorry to waste your time but I just came here for the point
The spread of Islam or the islamic missionary work or dawah means to "invite" (in Arabic, literally "invitation") to Islam. After the death of the Islamic prophet Muhammad, from the 7th century onwards, Islam spread rapidly from the Arabian Peninsula to the rest of the world through either trade and exploration or Muslim conquests.
