Why Is Intravenous Drug Use Responsible for Most HIV/AIDS Cases

Multiple Choice

Why is intravenous drug use responsible for most HIV/AIDS cases in Central Europe and Central Asia, while HIV/AIDS is a general problem spread through the entire population in sub-Saharan Africa?

A) HIV/AIDS is a different disease depending on where it is.
B) HIV/AIDS is a different epidemic depending on where it is.
C) HIV/AIDS is distributed equally throughout the world.
D) HIV/AIDS spreads differently based on climate.