Deserts are A) dry with little organic matter. Although it seems that D might be correct in fact it is not because desert soil is not totally unable to support plant life because in fact some plants grow in the desert and especially following a rain storm the desert can bloom with plant life. 
        
             
        
        
        
I would say it’s A or D not sure tho
        
                    
             
        
        
        
A. World Population doubles: 20th century
B. Last Drop in Human Population rates: Black Death Pandemic 
C. Industrial Revolution: 19th century
D. ??????
Confusing question - reword!
 
        
                    
             
        
        
        
Answer:
The Turks were introduced to Islam by the  MUSLIM ARABS 
Explanation:
The Muslim conquest of Transoxiana by the missionaries, sufis and foreign merchants helped convert Turks to Islam.and this was made possible through the infiltration of Persian and central Asian culture.
The first people that introduced the Turks to Islam before the conquest of Transoxiana by the missionaries, sufis and merchants, were the Muslim Arabs. Islam is currently the largest religion in Turkey with 97.8% of Turks identifying as Muslims and this started as far back as the 11th century