Final answer:
The subject of this question is Psychology and the grade is High School. The wife refusing to believe her husband's death despite hearing it from an officer falls under the stage of denial, as described by Kübler-Ross's five-stage model of grief.
Step-by-step explanation:
The subject of this question is Psychology, specifically related to Kübler-Ross's five-stage model of grief. The stages in this model are denial, anger, bargaining, depression, and acceptance. In the given scenario, the wife refusing to believe her husband's death despite hearing it from an officer falls under the stage of denial, as described by Kübler-Ross.