A previously healthy 15-year-old boy is brought to the emergency room with complaints of about 12h of progressive anorexia， nausea and pain of the right lower quadrant.On physical examination，he is found to have a rectal temperature of 38.18℃(100.58℉) and has direct and rebound abdominal tenderness localizing to McBurney's point as well as involuntary guarding in the right lower quadrant. At operation through a McBurney-type incision，the appendix and cecum are found to be normal，but the surgeon is impressed with the marked edema of the terminal ileum， which also has an overlying fibrinopurulent exudates. The correct procedure is to

A. Perform a standard appendectomy

B. Close the abdomen after culturing the exudates

C. Resect the involved terminal ileum

D. Perform the ileocolic resection

E. Perform an ileocolostomy to bypass the involved terminal ileum