What Is the Most Significant Scientific Contribution of Elizabeth Guillette's

What is the most significant scientific contribution of Elizabeth Guillette's research on pesticide use among the Yaqui?​

A) ​It presents scientific evidence that common pesticides cause more problems to adults than to children.
B) ​It highlights the importance of using pesticides to increase production levels for agriculturalists everywhere.
C) ​It suggests that highland indigenous communities may suffer increased effects from pesticides because of high altitude.
D) ​It suggests that pesticide use among agricultural communities may cause health problems worldwide.