In 1900, the top three causes of death in the United States were pneumonia/influenza, tuberculosis, and diarrhea/enteritis. Communicable diseases accounted for about 60 percent of all deaths. In 1900, heart disease and cancer were ranked number four and eight respectively.
All of the other choices have to do with chemicals, cancer or some other form of science, but Crustacea is a type of sea anthropod that has nothing to do with cancer.
