According to the world health organization (who) the third main cause of global deaths and as of 2007 african south of the sahara had 67 percent of the worlds population living with the virus
a. influenza
b. radies
c. ebola
d. hiv/aids

According to the world health organization (who) is the third main cause of global deaths and as of 2007 African south of the Sahara had 67 percent of the worlds population living with the virus 

Of these options, I would definitely say your answer is (D. HIV/AIDS. If I was any help at all, please tell me! :)

Have a wonderful rest of the day.