Which Statement About the Experiments of Tyrone Hayes on Abnormalities

Multiple Choice

Which statement about the experiments of Tyrone Hayes on abnormalities of male frog sex organs is correct?

A) In a set of controlled experiments,Hayes had to reject his hypothesis that atrazine was causing abnormalities in male frogs.
B) As a result of the comparative experiments,Hayes formed a new hypothesis that snails were causing the limb deformities in the frogs.
C) The controlled experiments compared the effects of various atrazine concentrations on reproductive tissues.
D) Hayes reasoned that if atrazine caused abnormal testes development,then all testes abnormalities in tadpoles are caused by various concentrations of atrazine.
E) The experiments showed that the abnormality rate was proportional to the level of atrazine exposure.