The nurse is caring for a client with a perforated duodenal ulcer. Which of the following imaging studies would the nurse anticipate the primary health care provider ordering to most accurately diagnose this condition?None
选项：

A:Abdominal CT scan with no contrast
B:Right upper quadrant ultrasound (US)
C:Abdominal computed tomography (CT) scan with oral contrast
D:Abdominal magnetic resonance imaging (MRI) with intravenous (IV) contrast