A young mother is involved in a car accident that claims the life of her two sons. When she is told that her two children have died from the injuries they suffered in the crash, she becomes agitated and combative. Her speech is disorganized and incoherent, but observers understand that she hears the voices of her children screaming to her to help them and that she believes that the hospital nurses are prison guards. These symptoms remit spontaneously in 1 wk. What is the most likely diagnosis?
a. Delirium secondary to brain injury
b. Schizophreniform disorder
c. Major depression with psychotic features
d. Brief psychotic disorder
e. Posttraumatic stress disorder