The following are multiple choice questions (with answers) about medical knowledge.   **Question:** A previously healthy 52-year-old woman is brought to the emergency department after sustaining burns over 45% of her body in a house fire. On arrival, she is in acute distress but is fully oriented. Aggressive intravenous fluid resuscitation is begun and the patient is transferred to the intensive care unit of a burn center. 20 hours later, she has several large, tarry black stools and develops hypotension and tachycardia. Despite appropriate lifesaving measures, she dies. Which of the following is the most likely underlying cause of the patient's tarry black stools?   (A) Decreased prostaglandin synthesis   (B) Erosion of tortuous submucosal arteriole   (C) Bacterial colonization of the gastric antrum   (D) Decreased gastric blood flow
['(D) Decreased gastric blood flow <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) Decreased prostaglandin synthesis \n (B) Erosion of tortuous submucosal arteriole \n (C) Bacterial colonization of the gastric antrum \n (D) Decreased gastric blood flow <> possible answers', "  A previously healthy 52-year-old woman is brought to the emergency department after sustaining burns over 45% of her body in a house fire. On arrival, she is in acute distress but is fully oriented. Aggressive intravenous fluid resuscitation is begun and the patient is transferred to the intensive care unit of a burn center. 20 hours later, she has several large, tarry black stools and develops hypotension and tachycardia. Despite appropriate lifesaving measures, she dies. Which of the following is the most likely underlying cause of the patient's tarry black stools? <> context@"]