单选题 The author mentions all of the following as factors which limit the persuasiveness of the evidence suggesting a link between environmental pollutants and cancer EXCEPT

• (A) The lack of study of the effects of pollutants on human health
• (B) Increased diagnosis rates
• (C) An increase in the worldwide breast cancer rate
• (D) A decrease in the worldwide uterine cancer rate
• (E) Geographical differences in cancer susceptibility