In concluding from the lack of increase in the incidence of uterine cancer that environmen

tal pollutants may not play a significant role in the increase of the incidence of breast cancer, the author makes which of the following assumptions？

A．Geographical differences between the rates of susceptibility to uterine cancer and susceptibility to breast cancer are negligible.

B．The human uterus is affected by the same set of environmental pollutants as the human breast.

C．Independent epidemiological studies are generally compatible with the experimental findings performed on humans.

D．It is generally easier to diagnose breast cancer than it is to diagnose uterine cancer.

E．Animal data similarly reflects that breast cancer rates are rising in animals while uterine cancer rates are falling.