<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 50-year-old man presents to the emergency department with chief complaints of abdominal pain, distension, and bloody diarrhea for a day. Abdominal pain was episodic in nature and limited to the left lower quadrant. It was also associated with nausea and vomiting. He also has a history of postprandial abdominal pain for several months. He had an acute myocardial infarction which was treated with thrombolytics 3 months ago. He is a chronic smoker and has been diagnosed with diabetes mellitus for 10 years. On physical examination, the patient is ill-looking with a blood pressure of 9060 mm Hg, pulse 100min, respiratory rate of 22min, temperature of 38.0C 100.5F with oxygen saturation of 98 in room air. The abdomen is tender on palpation and distended. Rectal examination demonstrates bright red color stool. Leukocyte count is 14,000mm3. Other biochemical tests were within normal ranges. Abdominal X-ray did not detect pneumoperitoneum or air-fluid level. The recent use of antibiotics was denied by the patient and stool culture was negative for C. difficile. Contrast-enhanced CT scan revealed segmental colitis involving the distal transverse colon. What is the most likely cause of the patients symptoms?? A: Hypokalemia, B: Aneurysm, C: Clostridium difficile infection, D: Embolism, E: Atherosclerosis,  <response>: Based on the information provided in the question stem, the key findings are:- 50-year-old man with abdominal pain, distension, and bloody diarrhea - Episodic pain limited to left lower quadrant, associated with nausea and vomiting- History of postprandial abdominal pain for several months- Recent myocardial infarction treated with thrombolytics 3 months ago- Chronic smoker, diabetes mellitus for 10 years- Vital signs showing hypotension and tachycardia - Abdominal tenderness and distension on exam- Bright red blood on rectal exam- Leukocytosis on labs- Negative stool culture for C. difficile- CT scan showing segmental colitis in distal transverse colonThe episodic and postprandial nature of the abdominal pain, along with the patients cardiac history, smoking, and diabetes, raise suspicion for mesenteric ischemia. The bloody diarrhea, leukocytosis, and CT findings of segmental colitis localized to the distal transverse colon are most consistent with ischemic colitis.Of the choices provided, embolism is the most likely cause of this presentation.E: Atherosclerosis 