Why Has the Percentage of Deaths Due to Infectious Diseases

Multiple Choice

Why has the percentage of deaths due to infectious diseases dropped from 1970 to 2010?

A) The use of pesticides has become increasingly effective at killing biological threats.
B) There are fewer people living in poverty as nations become more developed.
C) Fewer people live in disease-prone areas.
D) Public health education campaigns have been successful at prevention.
E) A growing number of children were immunized against the major infectious diseases.