After Reviewing the Literature on the Model of Bereavement Proposed

After reviewing the literature on the model of bereavement proposed by Kubler-Ross, what would researchers conclude about the validity of the model?

A) There are actually more stages than proposed by Kubler-Ross.
B) Many people do not go through the stages in the sequence proposed and some show no signs of any of the stages.
C) Men, but not women, seem to proceed through the stages in different orders and at different speeds.
D) The bargaining stage does not occur very often because most people realize the futility of such a response.