*This is a 65-year-old man who complains of left-sided lower abdominal pain for the past two days and bright red blood in his stool. The pain is getting progressively worse since then.*

*Which conditions should be considered in this patient?*

A. Crohn's disease

B. Appendicitis

C. Mesenteric vascular occlusion

D. Viral hepatitis

E. Peptic Ulcer Disease

F. Diverticulitis

G. Cholecystitis

H. Acute pancreatitis

I. Gastroesophageal reflux disease