DDT Was Widely Used as an Insecticide During and Following

DDT was widely used as an insecticide during and following World War II.However,the egg shells of birds that live in areas where DDT was used were very thin,and the young did not hatch.This is an example of

A) Sam Kean's book, The Disappearing Spoon.
B) Dan Schwartz's book, No Cure for Nature.
C) George Orwell's book, 1984.
D) Rachel Carson's book, Silent Spring.