Congenital heart disorder

A 4-year-old undergoes elective repair of the below congenital heart disorder with a primary resection and end to end anastomosis. The surgery is uncomplicated. Postoperatively on day 2, the child develops moderate to severe abdominal pain, nausea, and vomiting. Physical exam reveals signs of peritonitis. This complication could have been prevented by?

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A. Delaying surgery until the child was symptomatic
B. Maintaining high blood pressure in the postoperative period
C. Delaying feedings for at least 48-72 hours after surgery
D. Using an anti-embolic filter during the surgery