You are answering a USMLE-style medical question. Question: A 20-year-old woman is brought in for a psychiatric consultation by her mother who is concerned because of her daughter’s recent bizarre behavior. The patient’s father died from lung cancer 1 week ago. Though this has been stressful for the whole family, the daughter has been hearing voices and having intrusive thoughts ever since. These voices have conversations about her and how she should have been the one to die and they encourage her to kill herself. She has not been able to concentrate at work or at school. She has no other history of medical or psychiatric illness. She denies recent use of any medication. Today, her heart rate is 90/min, respiratory rate is 17/min, blood pressure is 110/65 mm Hg, and temperature is 36.9°C (98.4°F). On physical exam, she appears gaunt and anxious. Her heart has a regular rate and rhythm and her lungs are clear to auscultation bilaterally. CMP, CBC, and TSH are normal. A urine toxicology test is negative. What is the patient’s most likely diagnosis? Options: A) Brief psychotic disorder B) Adjustment disorder C) Schizophrenia D) Bereavement Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.