A researcher studies a group of people from childhood through adulthood. She divides the people into two experimental groups: one half were sexually abused as children; the other half were not. Which outcome of the study, if it occurs, would provide the best evidence that the cycle of abuse is inevitable?
a) Most in the abused group become abusers as adults; none in the non-abused group do.
b) More of those in the non-abused group than in the abused group become adult abusers.
c) The same percentage in both groups become sexual abusers as adults.
d) Most in the non-abused group become abusers as adults; none in the abused group do.
e) No one in either group become sexual abusers as adults.