*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 tests would be appropriate?*

A. Liver Function Tests

B. Urea breath test

C. Erythrocyte Sedimentation Rate

D. Comprehensive Metabolic Panel

E. Ultrasound

F. SPECT scan of the abdomen

G. Barium enema

H. Complete Blood Count

I. Thyroid Function Tests