Final answer:
Dana is most likely experiencing the stage of depression in the Kübler-Ross five-stage model of grief, which outlines the stages as denial, anger, bargaining, depression, and acceptance.
Step-by-step explanation:
The stage of grief Dana is most likely experiencing, given the symptoms of not being able to get out of bed, having a decreased appetite, and crying most of the day, is depression. This stage is characterized by deep sadness and the realization of the loss. It is the fourth stage in Elisabeth Kübler-Ross's five-stage model of grief, which also includes denial, anger, bargaining, and acceptance, in that order. Depression in the context of grief allows for the feeling of resignation as the situation begins to seem hopeless. It is a natural and important part of the grieving process that leads to eventual acceptance. The correct order of stages in Kübler-Ross's model, as per the choices given in the question, is denial, anger, bargaining, depression, acceptance, which is option (c). This model was outlined in her book, On Death and Dying, which remains a seminal work on the topic of grief and grieving.