What Is True About Air Pollution Globally

What is true about air pollution globally?

A) People in poorer countries breathe easier than they once did, but in rich countries, air pollution is getting worse.
B) People in rich countries can breathe easier than they once did.
C) Air pollution is of the same magnitude globally.
D) Rich countries have inherited the pollution of poorer countries.
E) The low technological level in some countries means that their air pollution is not a problem in urban areas there.