Which of the following regions in the world will witness the sharpest drop in life expectancy?

A data shows that the global AIDS pandemic will cause a sharp drop in life expectancy in dozens of countries, in some cases, declines of three decades. Several nations are losing a century’s progress in extending the length of life. Nations in many parts of the world, 51 in all, are suffering declining life expectancies because of an increasing prevalence of HIV infection. The increase is occurring in Asia, Latin America, and the Caribbean, but is greatest in sub-Saharan Africa, a region with only 10% of the world’s population but 70% of the world’s HIV infections. Seven African countries have life expectancies of less than 40 years.