During World War II, the military developed pesticides to help protect soldiers at war from disease-carrying insects. After the war, Americans began to use pesticides at home too. But pesticides had unforeseen dangers. Scientist Rachel Carson, who worked for the U. S. Fish and Wildlife Service, observed that birds were getting sick and dying after eating insecte exposed to the pesticide DDT. Carson's book Silent Spring warned that pesticides meant for insects were affecting the whole ecosystem, with the potential make human beings sick as well.
Carson's research, which resulted in a ban on DDT, is credited with inspiring the modern environmental movement. She reminded people that we are part of nature as much as any other plant or animal.

Which supporting detail from the passage is most important to include in a summary?

A. The dangers of pesticides were only discovered years after their creation.
B. Pesticides were developed during World War ll.
C. Pesticides were used at home as well as by the military.
D. Pesticides affected the entire ecosystem, not just insects.