One Problem with Conclusions About the Benefits of the Authoritative

One problem with conclusions about the benefits of the authoritative parenting style is that

A) the effects of parenting styles cannot be separated from the effects of shared environmental influences
B) the personality characteristics that led to the parenting style may have also been passed to the offspring.
C) the physical characteristics of children may lead to a more relaxed approach to parenting when the child resembles one of the parents.
D) the flexibility of the authoritative style means that it is sometimes hard to distinguish from the authoritarian style.