A patient with a previous open abdominal aortic aneurysm graft has a self-limited haematemesis, then becomes hypotensive with recurrent gastrointestinal bleeding. Endoscopy is non-diagnostic. Which action best addresses the leading diagnosis?ARepeat endoscopy after erythromycin with interventional radiology on standbyBImmediate vascular-surgical activation and CT angiography if sufficiently stableCTagged-red-cell scintigraphy followed by selective mesenteric angiographic embolisationDMassive-haemorrhage resuscitation and repeat endoscopy during the next bleeding episodeEEmergency laparotomy by general surgery before any vascular imaging or consultationCheck my answer