Early Research on Physical Violence Between Intimates Was Marked by Some

Early research on physical violence between intimates was marked by some confusion. Different groups of researchers described quite different patterns and prevalence of violent behavior. One important reason for the differences of opinion was that:

A) there was a pressing need for funding for shelters for battered women.
B) aggression was largely Òbehind closed doors,Ó and it was difficult to study well.
C) family sociologists were still developing good measures of physical abuse.
D) different groups of scholars were relying on different sources of data.