Africa is facing the worst health crisis in human history. More than 17 million Africans have died from AIDS, and 28 million of the 40 million people worldwide living with HIV live in Africa. What's more, thousands of Africans die of tuberculosis, malaria, and other preventable diseases every day. During the past two decades, the average life expectancy in sub-Saharan Africa has dropped by 15 years. from an article by Salih Booker

What kind of support does the writer give for the statement that Africa is facing the worst health crisis in human history?
A.
analogy
B.
example
C.
statistics
D.
expert opinion